MOLECULES
This page is maintained by Brendan M McLaughlin
How to contact me:
electronic mail:
bmclaughlin@cfa.harvard.edu
Telephone: (617)495-7386,
Fax: (617)496-7668
POLYATOMIC CODES
Features of MOLECULE the Intgeral Generator
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Developed by Jan Almlof at Upsala and Stockholm, Sweden.
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Employs the DOUBLE COSET method (coded only for D2h) to
compute the integrals. Around the same time Ernest Davidson discovered
/published the same approach independently.
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In use since 1974 and widely used by quantum chemists.
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Vectorized by Peter Taylor and Jan Almlof in 1986 for
Cray Architectures.
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Permits arbitary angular momentum but requires hardwired
transformation for the Cartesian to spherical harmonic transform.
Only up to l=6 are supplied with the code.
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Two versions exist: (1) Almlofs Cray version 1986,
(2) Machine portable form of Almlof's codes
has been optimised for IBM 3090 and RS/6000
platforms (Yoshimine, Liu, Lee and Barnes).
References
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J Almlof (1972), Proceedings of the 2nd Seminar Computational
Problems in Quantum Chemistry, pages 14-25,
"Methods for a rapid evaluation of electron-repulsion integrals in
Large-scale LCGO calculations"
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C M Reeves and M C Harrison (1963), J. Chem Phys. vol 39, 11.
"The use of Guassian functions in the calculations of wave functions
for small molecules".
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T H Dunning Jr (1970) J. Chem. Phys. vol 53, 2823,
"Gaussian Basis Functions for Use in Molecular Calculations I;
Contraction of (9s,5p) Atomic Basis Sets for the First-Row Atoms".
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R C Raffenetti (1973) J. Chem. Phys. vol 58, 4452,
"General contraction of Guassian atomic orbitals: core, valence,
polarization and diffuse basis sets; Molecular integral evaluation".
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J Almlof (1974) "The program system MOLECULE: Integral program,
University of Stockholm
Institute of Physics (USIP), Report 74-29"
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L E McMurchie and E R Davidson (1978) J. Comp. Phys. vol 26, 218,
"One- and two-electron integrals over Cartesian Gaussian functions".
- J Almlof et al (1982), J. Comput. Chem. vol 3, 385,
"Principles for a Direct SCF approach
to LCAO-MO ab-initio calculations".
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V Saunders (1983), in "Methods in Computational Molecular Physics,
(D Reidel Publishing Company), Edited by G. H. F. Diercksen".
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J Almlof and P R Taylor (1984), "In Advanced Theories and Computational
Approaches to the Electronic Structure of Molecules: Edited by
C E Dykstra (Riedel, Dordrecht, 1984)"
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A D McLean, M Yoshimine, B H Lengsfield, P S Bagus and
B Liu, (1991), pp. 233 "Alchemy II : A Research Tool for Molecular
Electronic Structure and Interactions in:
Modern Techniques in Computational Chemistry 1991, MOTECC 91,
E Clementi, Ed., pub.~Elsevier B.V. (Leiden)".
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C J Gillan, J Tennyson and P G Burke (1995), pp 239, "The UK Molecular
R-matrix scattering package : A Computational Perspective
Computational Methods for Electron-Molecule Collisions, Edited by
W M Huo and F Gianturco (Plenum: New York and London)".
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Xuan Jiancheng and Jiang Shouping (1991), pp 123,
"The Rapid Esitmate of a Guass Integral: International Journal
of Quantum Chemistry, vol XXXIX".
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O Vahtras, J Almlof and M W Feyereisen (19993),
"Integral approximations for LCAO-SCF calculations",
Chem. Phys. Letts. Vol 213, 514-518.
ALCHEMY II STRUCTURE CODES
References
The ALCHEMY programs are general SCF, MCSCF and CI molecular
programs written by the computational chemistry staff of the
IBM San Jose Research Laboratory.
B Roos, C Salez, A Veillard and E Clementi,
" A General Program for Calculations of Atomic SCF orbitals
by the Expansion Method", Technical Report RJ518, IBM Research
Laboratory (1968).
A D McLean, M Yoshimine, B H Lengsfield, P S Bagus and
B Liu, (1991), pp. 233 "Alchemy II : A Research Tool for Molecular
Electronic Structure and Interactions in:
Modern Techniques in Computational Chemistry 1991, MOTECC 91,
E Clementi, Ed., pub.~Elsevier B.V. (Leiden)".
CAMPHOR (C10 H12 O)
References
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C J Gillan (1994), The Irish Scientist, January issue, page 4,
"Collisions in Belfast"
He2+ SCF GROUND STATE DISTRIBUTION
References
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B M McLaughlin and C J Gillan, Electron collisions with
the He$_2^+$ cation, in Computational Methods for
Electron Molecule Collisions, edited by W Huo and F Gianturco,
(Plenum Press: New York and London) 255-265 (1995)
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C J Gillan, B M McLaughlin and P G Burke, A Study of
He$_2(^{1,3}\Sigma_g^+)$ bound and continuum states in
Dissociative Recombination: Theory , Experiment and Applications,
edited by J B A Mitchel and B Rowe (Plenum Press: New York and London)
157 (1993)
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B M McLaughlin, C J Gillan, P G Burke and J S Dahler, $^3\Sigma_u^+$
bound and continuum states in e$^-$ - He$_2^+$ scattering,
Phys. Rev. A 47, 1967 (1993)
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B M McLaughlin, C J Gillan, P G Burke and J S Dahler, Ab initio studies
of e$^-$ -He$_2^+$ collisions, in Atomic and Molecular Physics,
edited by C Cisneros, I Alvarez and T J Morgan, (World Scientific:
New Jersey and London) 161 (1991).
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B M McLaughlin, C J Gillan, P G Burke and J S Dahler, Low energy
electron collisions with He$_2^+$ molecules,
Nucl. Inst & Methods B 53, 518 (1991).
POTENTIAL ENERGY CURVES of CH
Lowest lying five electronic states as function of geometry
References
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G C Lie, J Hinze and B Liu (1973), J. Chem. Phys. vol 59,1872,
"Valence excited states of CH. I: Potential curves"
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G C Lie,J Hinze and B Liu, (1972), J. Chem. Phys. vol 57,625,
"Near Hartree-Fock potentials for excited states of CH".
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B M McLaughlin, C J Gillan and P G Burke, (1996), Bull. Am. Phys. Soc.
vol 41, 1067, "Electron impact electronic excitation of CH molecules".
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C J Gillan, B M McLaughlin and P G Burke, (1996),
J. Phys. B,
"Electron Imapct Electronic Excitation of the CH molecule:
A Theoretical Study Using the R-matrix method"
R-matrix poles Curves (1-Delta) CH-
POTENTIAL ENERGY CURVES of N2
Thirteen low lying electronic states as function of geometry
References
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B L Schneider, M Le Dourneuf and Vo Jy Lan (1979),
Phys. Rev. Letts. vol 43, 1926, " Resonant Vibrational
Excitation of N2 by Low-Energy Electrons:
An Ab Initio R-Matrix Calculation".
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L A Morgan (1986), J. Phys. B. vol 19, L439,
"Resonant vibrational excitation of N2 by low-energy electron impact"
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C J Gillan, O Nagy, P G Burke, L A Morgan and C J Noble (1987),
J. Phys. B. vol 20, 4585, " Electron scattering by nitrogen molecules".
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C J Gillan, C J Noble and P G Burke (1988), J. Phys. B. vol 21, L53,
"Electron scattering by nitrogen molecules
including polarized pseudostates"
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C J Gillan, C J Noble and P G Burke (1990), J. Phys. B. vol 23, L407,
"Electronic excitation in low-energy
electron scattering by N2 molecules".
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C J Gillan, J Tennyson, B M McLaughlin and P G Burke, (1996), J. Phys. B.
vol 27, 1531, "Low energy electron impact excitation of the
Nitrogen Molecule: Optically forbidden transitions".
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J Tennyson, B M McLaughlin and C J Gillan, (1996), Bull. Am. Phys. Soc.
vol 41, 1135, " Electron impact electronic excitation of
molecules using the R-matrix method".
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C J Gillan and B M McLaughlin, (1996), At. Data & Nucl. Data Tables ,
"Angular Distrubtions for Optically Forbidden Transitions
in e$^-$ - N$_2$ Scattering".
The HARTREE-FOCK ENERGY SURFACE of WATER(H2O)