Huw O. Pritchard

Huw O. Pritchard's AcademicInfluence.com Rankings

Huw O. Pritchard

Chemistry

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Chemistry

Huw O. Pritchard's Degrees

PhD Chemistry University of Oxford
Bachelors Chemistry University of Oxford

Why Is Huw O. Pritchard Influential?

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According to Wikipedia, Huw Owen Pritchard was a Welsh-born Canadian chemist who was a Distinguished Research Professor Emeritus at York University.

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Huw O. Pritchard's Published Works

Number of citations in a given year to any of this author's works

Total number of citations to an author for the works they published in a given year. This highlights publication of the most important work(s) by the author

Published Works

The Concept Of Electronegativity (1955) (500)
The Determination of Electron Affinities. (1953) (209)
The measure of electronegativity (1953) (190)
Born—Oppenheimer Separation for Three‐Particle Systems. II. Two‐Center Wavefunctions (1967) (92)
How do diesel-fuel ignition improvers work? (1993) (87)
Born—Oppenheimer Separation for Three‐Particle Systems. III. Applications (1967) (82)
Rotation-vibration level energies of the hydrogen and deuterium molecule-ions (1974) (75)
Photochemical Experiments in Rigid Media at Low Temperatures. II. The Reactions of Methylene, Cyclopentadienylene and Diphenylmethylene (1959) (72)
Born—Oppenheimer Separation for Three-Particle Systems. I. Theory (1966) (70)
The Study of Chlorine Atom Reactions in the Gas Phase (1955) (59)
Thermal decomposition of di-tert-butyl peroxide at high pressure (1968) (48)
Effect of free-radical release on diesel ignition delay under simulated cold-starting conditions (1990) (46)
The enthalpy of isomerisation of methyl isocyanide (1977) (46)
Why atoms recombine more slowly as the temperature goes up (1976) (45)
The reactions of trifluoromethyl radicals (1956) (41)
Reaction of nitrogen dioxide with hydrocarbons and its influence on spontaneous ignition. A computational study (2001) (38)
Studies in energy transfer II. The isomerization of cyclopropane—a quasi-unimolecular reaction (1953) (38)
Cetane number vs. structure in paraffin hydrocarbons (1998) (35)
THE KINETICS OF DISSOCIATION OF A DIATOMIC GAS (1961) (35)
The application of electronic digital computers to molecular orbital problems - II. A new approximation for hetero-atom systems (1956) (33)
THE MASTER EQUATION FOR THE DISSOCIATION OF A DILUTE DIATOMIC GAS. II. APPLICATION TO THE DISSOCIATION OF HYDROGEN (1969) (33)
The Gas-Phase Fluorination of Hydrogen-Methane Mixtures (1959) (32)
The Master Equation for the Dissociation of a Dilute Diatomic Gas. VIII. The Rotational Contribution to Dissociation and Recombination (1973) (31)
Abstraction of Halogen Atoms by Methyl Radicals (1966) (30)
Thermochemistry of metallic alkyls. Part V.—Mercury di-propyl and mercury di-isopropyl (1952) (27)
The thermal isomerisation of methyl isocyanide in the temperature range 120–320 °C (1976) (25)
The quantum theory of unimolecular reactions: Author index (1984) (25)
Thermochemistry of metallic alkyls. III.—mercury dimethyl and mercury methyl halides (1950) (24)
Self-abstraction in aliphatic hydroperoxyl radicals (1998) (23)
The Quantum Theory of Unimolecular Reactions (1984) (23)
Toward a Unified Master-Equation Theory of Thermal Decomposition Reactions. Analytic Solution for Diatomic Dissociation - Correction (1979) (21)
Stimulation of diesel-fuel ignition by benzyl radicals☆ (1995) (19)
THE REACTIONS OF PHENYL RADICALS IN THE GAS PHASE AND THE CARBON-HYDROGEN DISSOCIATION ENERGY IN BENZENE (1962) (19)
Theoretical study of benzyl radical reactivity in combustion systems (1998) (19)
Sensitivity of molecular dynamics unimolecular rate calculations to defects in the potential-energy surface (1996) (18)
Kinetics and thermodynamics of the reaction between iodine and fluoroform and the heat of formation of trifluoromethyl iodide (1967) (18)
Interpretation of the Kinetics of Mercury Alkyl Pyrolysis (1956) (17)
Free-radical-catalyzed isomerization of isocyanides (1967) (17)
Dissociative ring-closure in aliphatic hydroperoxyl radicals (1999) (16)
The application of electronic digital computers to molecular orbital problems I. The calculation of bond lengths in aromatic hydrocarbons (1954) (16)
Exponential Correlation Functions for Two‐Electron Atoms (1964) (15)
Synergy between additives in stimulating diesel-fuel ignition (1993) (15)
Thermochemistry of metallic alkyls. IV. Mercury diethyl and mercury diphenyl (1951) (15)
Network effects in the dissociation and recombination of a diatomic gas (1975) (15)
Vibration-Vibration Coupling in the Dissociation of a Diatomic Gas, (1970) (15)
Studies in energy transfer III. The effect of added gases on the decomposition of cyclobutane (1953) (15)
A reformulation of the theory of unimolecular reactions (1978) (15)
Equalization of Electronegativity (1963) (15)
How Do Diesel‐Fuel Ignition Improvers Work? (1993) (14)
Abstraction of Chlorine Atoms by Methyl Radicals (1964) (14)
Kinetics and Thermodynamics of the Reaction between Iodine and Methane and the Heat of Formation of Methyl Iodide (1965) (14)
The hydrogen molecule—comparison between theory and experiment (1969) (14)
Ultraviolet sensitization of silicon detectors for space astronomical applications. (1979) (13)
Unimolecular reactions of N2O and CO2 at high pressure (1979) (13)
Pressure dependence of the visible lodine bana (1964) (13)
THE DISSOCIATION OF DIATOMIC MOLECULES AND THE RECOMBINATION OF ATOMS (1962) (13)
A new unimolecular rate expression (1980) (13)
The Master Equation for the Dissociation of a Dilute Diatomic Gas. I. A Method of Solution (1969) (12)
The calculation of bond lengths in naphthalene and anthracene (1955) (12)
State-to-state theory of unimolecular reactions (1985) (12)
Recrossings and transition-state theory. (2005) (12)
Reversible and irreversible formulation of unimolecular reactions (1992) (12)
The Master Equation for the Dissociation of a Dilute Diatomic Gas. X. How Rotation Causes Low Arrhenius Temperature Coefficients (1973) (12)
Semi-emprical non-adiabatic potential energy curves for hydrogen, deutirium, and their molecule-ions (1977) (11)
Dipole moments of diatomic molecules (1958) (11)
Molecular rotation and isomerisation in hydrogen isocyanide (1995) (11)
Randomization and isomerization rate constants for isocyanogen (1996) (11)
The Reactions of CN Radicals in the Gas Phase (1965) (11)
The heats of formation of trifluoromethyl chloride and bromide (1967) (10)
An R.K.R.-like estimate of the effective non-adiabatic internuclear potential for the hydrogen molecule (1976) (10)
Correlated Orbitals for Excited States of He and H (1965) (10)
Methyl Isocyanide as a Key Molecule in Thermal Explosion Theory (1973) (10)
Lindemann unimolecular fall-off in weak-collision systems at high temperature (1978) (10)
A METHOD FOR THE STUDY OF CHLORINE ATOM REACTIONS. THE REACTION Cl + CH4 → CH3 + HCl (1954) (10)
The kinetics of internal energy randomisation in thermal unimolecular reactions (1980) (10)
The thermal decomposition of tert.-butylamine (1954) (10)
Secondary Effects in the Thermal Decompositions of Cyclopropane and Cyclobutane (1958) (10)
We Need To Update the Teaching of Valence Theory (2012) (10)
Methyl isocyanide is an RRKM molecule after all (1994) (9)
Some analytic properties of the master equation for unimolecular reaction (1981) (9)
The nitrogen pentoxide dissociation equilibrium (1994) (9)
The limiting high-pressure rate constant for the thermal isomerization of methyl isocyanide (1970) (9)
Atmospheric oxidation and self-heating in rubber-containing materials (2003) (8)
Retardation of spontaneous hydrocarbon ignition in diesel engines by di-tert-butyl peroxide (2000) (8)
The properties of diphenyl-ether calorimeters (1972) (8)
Thermodynamics of phosgene formation from carbon monoxide and chlorine (1970) (8)
Comparison of unimolecular rates calculated classically and quantally from the same potential surface (1986) (8)
Thermal explosions of methyl isocyanide in spherical vessels (1985) (8)
Theoretical calculation of intramolecular reactions in methylperoxyl and ethylperoxyl radicals (1995) (8)
Internal energy randomisation in weak-collision unimolecular reaction systems (1981) (8)
Solution of the strong-collision master equation for unimolecular reaction (1981) (8)
The commutative property of strong-transition rate matrices (1979) (7)
418. Arrhenius parameters of some reactions involving multiplicity changes (1956) (7)
THE THERMAL ISOMERIZATION OF CYCLOPROPANE AT LOW PRESSURES (1963) (7)
The variation method and the algebraic eigenvalue problem (1969) (7)
212. Some considerations on the strengths of hybrid bonds in excited states of the hydrogen molecule-ion (1951) (7)
Molecular Rotation and Isomerization in Methyl Isocyanide (1994) (7)
Thermal Decomposition of di-tert-Butyl Peroxide in Binary Mixtures near the Critical Point (1971) (7)
COMPLETE SET EXPANSIONS FOR MOLECULAR WAVE FUNCTIONS (1961) (7)
Classical dynamics of intramolecular energy flow in ethane (1991) (7)
The Master Equation for the Dissociation of a Dilute Diatomic Gas IX. Rotation–Vibration Relaxation Times (1973) (7)
EFFECT OF NON-ZERO EXTINCTION COEFFICIENT ON ABSTRACTION–RECOMBINATION RATE RATIOS IN PHOTOCHEMICAL SYSTEMS (1963) (7)
The Photoisomerization of Gaseous Methyl Isocyanide (1966) (7)
Photochemical behavior of isocyanides (1971) (7)
792. The thermal decomposition of azomethane (1953) (6)
Photolysis of Di-tert-butyl Peroxide at High Pressure (1972) (6)
Zero-point energy problem in molecular dynamics calculations, and an improved method for sampling trajectories (1995) (6)
Information theory and bulk rotational or vibrational relaxation processes (1977) (6)
58. The heats of hydrolysis of the chloro-substituted acetyl chlorides (1950) (6)
A re-examination of the adiabatic correction term for the hydrogen molecule (1976) (6)
The Thermal Decomposition of Mercuric Cyanide Vapor (1964) (6)
Extrapolations of Electron Affinities (1954) (6)
127. The heats of hydrolysis of the benzoyl halides (1950) (6)
Entropy Production in Simple Chemical Reactions (1975) (5)
On the interpretation of measured rotational and vibrational relaxation times. II. Sudden change experiments (1976) (5)
Isolation of the initial step in the thermal decomposition of di-tert-butyl peroxide (1969) (5)
Decoupling vibrational relaxation from collisional deactivation in the theory of unimolecular reactions (1986) (5)
Calorimetric study of an electrochemical reduction (1978) (5)
Does black-body radiation cause intramolecular vibrational relaxation? (1993) (5)
A laplace transform solution of Schrödinger's equation using symbolic algebra (1992) (5)
Chemical activation with randomization (1984) (5)
Effect of rotation on molecular shape (1992) (5)
Computational chemistry in the 1950s. (2001) (5)
The enthalpy of formation of bromophosgene (1972) (5)
The enthalpy of formation of phosgene (1972) (5)
On the interpretation of measured rotational and vibrational relaxation times. I. Sound dispersion experiments (1976) (5)
Entropy Production in Chemically Reacting Systems (1974) (5)
Strict Lindemann behaviour because of an activation bottleneck (1981) (5)
Thermodynamics of the reaction between carbon dioxide and carbon tetrachloride (1969) (5)
The C–C Bond Dissociation Energies in Cyclanes (1954) (5)
An alternative view of unimolecular reaction theory (1977) (5)
518. Hybridization in the ground state of the hydrogen molecule-ion (1956) (5)
Unimolecular reactions with intense radiation (1982) (4)
Homogeneous periodic reactions (1968) (4)
Partial state-to-state calculation of the infinite-pressure rate constant for the isomerisation of methyl isocyanide (1987) (4)
The Master Equation for the Dissociation of a Dilute Diatomic Gas. IV. The Bottleneck Phenomenon (1971) (4)
Master Equation for the Dissociation of a Dilute Diatomic Gas. V. Effect of Energy-level Spacing (1971) (4)
An explicit inverse of a tridiagonal matrix (1983) (4)
709. A new solution of the wave equation for H (1957) (4)
Negative Activation Energies (1959) (4)
Fall-off shape and incubation times in weak-collision thermal unimolecular reactions (1984) (4)
The reactions of methyl radicals with acetone, diethyl ketone, and di-tert.-butyl peroxide (1954) (4)
Anaerobic operation of an internal combustion engine (1986) (4)
208. The thermal decomposition of octadeuterocyclobutane and octafluorocyclobutane (1956) (4)
THE ISOMERIZATION OF CYCLOPROPANE—A QUASI-UNIMOLECULAR REACTION (1952) (4)
Analysis of a proposal for nitric-oxide abatement in jet-aircraft engines (1977) (3)
The Master Equation for the Dissociation of a Dilute Diatomic Gas. VI. Solution of Coupled Sets of Master Equations (1972) (3)
Comments on “Initial Ionization Rates and Collision Cross Sections in Shock‐Heated Argon” (1970) (3)
General behaviour of thermal unimolecular reactions at the low-pressure limit (1985) (3)
The Photolysis of Acetaldehyde (1953) (3)
Distribution of vibrational potential energy in molecular systems (1999) (3)
N -Methyl-1,3,5,2-trioxazinane, a possible spontaneous ignition sensitiser† (1998) (3)
Newton-variational solution of the Frank―Kamenetskii thermal explosion problem (1989) (3)
The enthalpy of formation of benzoyl chloride (1972) (3)
Excited States of H (1958) (3)
The thermochemistry of the chloro-benzoyl chlorides (1975) (3)
On the atmospheric oxidation of liquid toluene. (2006) (3)
Shapes of unimolecular fall-off curves (1992) (3)
LV. A property of ‘Repeating’ secular determinants (1954) (3)
Electrostatic Interpretation of Directed Valence (1956) (3)
Perturbed normal-mode analysis of induction times, relaxation times, and reaction rates in unimolecular reactions (1979) (3)
The thermal isomerisation of allyl isocyanide (1979) (3)
Vibrational disequilibrium in chemical reactions (1967) (3)
Variational energies for highly excited states of the helium atom (1978) (2)
The Master Equation for the Dissociation of a Dilute Diatomic Gas. VII. Vibration–Dissociation Coupling in an Expansion Nozzle (1972) (2)
201. The dipole moment of the helium hydride molecule-ion, HeH2+ (1957) (2)
Heats of Formation of Dioxane—Halogen Complexes (1964) (2)
Eigenvalue Methods in Unimolecular Rate Calculations (2004) (2)
Kinetics of Iodination of Mercury Dimethyl in Various Solvents (1966) (2)
Oriented collisions in the recombination and disproportionation of free radicals (1985) (2)
On the classical simulation of unimolecular reaction processes (2011) (2)
Faraday communications. Rotational disintegration of polyatomic molecules (1990) (2)
Carbon dioxide versus energy balances for transportation fuels (2009) (2)
On the distinction between weak and strong collisions in the theory of unimolecular reactions (1988) (2)
The Master Equation for the Dissociation of a Dilute Diatomic Gas. XI. Vibrational Freezing in a Nozzle Flow (1974) (2)
The unimolecular isomerisation of monofluorocyclopropane: a reaction with multiple fall-off characteristics? (1977) (2)
On the Unimolecular Decomposition of the tert-Butoxy Radical (1973) (2)
Energy transfer in very long range collisions (1992) (2)
Specific decomposition rate constants in unimolecular reactions (1980) (2)
On the reliability of the inversion of the Arrhenius rate law (1979) (2)
Defective modelling of chaotic motions on empirical potential energy surfaces (2013) (2)
The temperature coefficients of diatomic dissociation and recombination reactions (1971) (2)
Thermal explosions with variable thermal conductivity (1982) (2)
Partial state-to-state calculation of the rate of thermal dissociation of ethane (1990) (2)
Stiffness of the master equation for low-temperature reaction rates (1983) (2)
Some Kinetic Studies with para-Hydrogen. (1956) (2)
THE REACTIONS OF DIPHENYLMETHYLENE RADICALS IN THE GAS PHASE (1960) (2)
224. The heat of hydrolysis of acetyl fluoride (1950) (2)
On the interpretation of measured rotational and vibrational relaxation times. III. Failure of the mixture rule for non-dilute gases (1979) (2)
Nonexistence of 1sns Autoionizing States of H (1969) (2)
Temperature profiles for reactions with self-heating (1982) (1)
Density of states and the steepest descent method: a non-iterative procedure (1977) (1)
On the connection between incubation and relaxation times in thermal unimolecular reactions (1982) (1)
Improved formulae for thermal unimolecular reaction rates with randomisation failure (1984) (1)
On the uniform-interactions-mixing assumption in the theory of radiationless transitions (1979) (1)
Electron correlation as a rotating polarization (1979) (1)
Complete Variational Treatment of the Hydrogen Molecule. I. The Full Electronic Hamiltonian (1973) (1)
INFRARED EVIDENCE OF SPECIFIC MOLECULAR INTERACTIONS IN RIGID MEDIA AT LOW TEMPERATURES (1961) (1)
Validating potential energy surfaces for classical trajectory calculations (2015) (1)
Isolation of diesel-fuel ignition inhibitors in reverse micelles (1999) (1)
Temperature profiles in weak thermal explosions (1988) (1)
Highly excited 1 sns states of the helium atom (1976) (1)
Entropy production in bulk isothermal relaxation (1977) (1)
Convergence of Hydrogen-Atom Wavefunctions (1963) (1)
Inflections in unimolecular falloff curves (1986) (1)
Tunneling in isolated resonance unimolecular reaction theory (1988) (1)
Numerical simulation of the thermal explosions of gaseous methyl isocyanide (1988) (1)
Limiting low-pressure rate constant for the stepladder model of a thermal unimolecular reaction (1984) (1)
Connection between Classical and Quantum Descriptions of Evolution (1998) (1)
Thermal explosions and the linear mixture rule (1988) (1)
Simulation of thermal explosions in gaseous mixtures (1988) (1)
Theory of vibrational relaxation in mixtures of ortho- and para-hydrogen (1981) (1)
Thermal explosions of methyl isocyanide: a re-examination of the data (1979) (1)
Ionization in a dense hydrogen plasma: analytic solution of the master equation (1978) (1)
The reaction of methylene radicals with methyl isocyanide (1979) (0)
Related upper and lower bounds to atomic binding energies (1993) (0)
The quantum theory of unimolecular reactions: A molecular dynamic approach to specific rate functions (1984) (0)
Thermal unimolecular reactions with two activation pathways (1984) (0)
N-Methyl-1,3,5,2-trioxazinane, a Possible Spontaneous Ignition Sensitizer. (1998) (0)
The quantum theory of unimolecular reactions: Units, symbols, and errata (1984) (0)
The quantum theory of unimolecular reactions: Unimolecular fall-off in strong collision systems (1984) (0)
The master equation for internal relaxation in molecules (1984) (0)
Comparison of translational energy distributions calculated classically and quantally for the same reaction (1988) (0)
The quantum theory of unimolecular reactions: The observed properties of thermal unimolecular reactions (1984) (0)
Eigenvalue methods for unimolecular rate calculations with several products. (2007) (0)
OF THE INFINITE-PRESSURE RATE CONSTANT FOR THE ISOMERISA TION OF METHYL ISOCYANIDE (1987) (0)
Staged Turbojet Engine Would Emit Less NO (1982) (0)
KINETICS OF DISSOCIATIVE CYCLIZATION OF HYDROPEROXYL RADICALS (1999) (0)
SCALING AND THE VIRIAL THEOREM (1963) (0)
The quantum theory of unimolecular reactions: Rate constants for the thermal isomerisation of cyclopropane and for the thermal decomposition of cyclobutane (1984) (0)
THE THERMAL ISOMERIZATION OF METHYL ISOCYANIDE IN THE TEMPERATURE RANGE 120-320°C (1976) (0)
Computationaly in the 1950s (2001) (0)
The quantum theory of unimolecular reactions: Computer programs for thermal unimolecular reactions (1984) (0)
Failure of the scaling laws in the thermal explosion of methyl isocyanide (1977) (0)
tial energy surfaces for classical trajectory calculations (2015) (0)
Isomerization of methyl isocyanide sensitized by vibrationally excited ethane (1969) (0)
The heat of mixing of hydrogen cyanide and hydrogen fluoride in the liquid phase (1978) (0)
Comment: Strict Lindemann behavior as a limiting form (1983) (0)
Reaction as a perturbation of the internal relaxation (1984) (0)
394. The heats of hydrolysis of chloral and bromal, and the C—C bond dissociation energies in chloral and bromal (1950) (0)
Multi-exponential unimolecular rate formulae (1990) (0)
Weak collision processes (1984) (0)
Incubation times in strong-collision thermal unimolecular reactions (1983) (0)
A TEST OF TRANSITION STATE THEORY (1960) (0)
The quantum theory of unimolecular reactions: Building in the randomisation processes (1984) (0)
The quantum theory of unimolecular reactions: References (1984) (0)
Intramolecular energy transfer in bimolecular reactions (2010) (0)
Iso-Nitrous Acid: Spectral Frequencies and Possible Synthetic Pathways. (2002) (0)
The latent heat of vaporization of an organic solid: An undergraduate experiment (1975) (0)
Unimolecular reactions with intense radiation (continued) (1982) (0)
The quantum theory of unimolecular reactions: How well does it all work? (1984) (0)
Relative collision efficiencies in thermal unimolecular reactions (1981) (0)
Anomalous Rate Laws in the Halogenation of Carbon Tetrahalides (1972) (0)
The quantum theory of unimolecular reactions: The specific rate function k ( E ) as an inverse Laplace transform (1984) (0)
How Brian Gray became a combustion scientist (2001) (0)
THE MASTER EQUATION FOR THE DISSOCIATION OF A DILUTE DIATOMIC GAS PART 10, HOW ROTATION CAUSES LOW ARRHENIUS TEMPERATURE COEFFICIENTS (1973) (0)
Spectroscopic and Kinetic Studies in Shock Tubes (1970) (0)

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What Schools Are Affiliated With Huw O. Pritchard?

Huw O. Pritchard is affiliated with the following schools:

York University
Victoria University of Manchester
Imperial College London
University of Oxford

Huw O. Pritchard's Academic­Influence.com Rankings