AM1*

AM1, AM-1, or variation, may refer to: AM1 may refer to: * Austin Model 1, a model used in quantum physics * BMW AM1, a version of the 1932 BMW 3/20 car * British Rail Class AM1, a class of electric multiple unit train * Socket AM1, a CPU socket from AMD for APUs with an integrated chipset * Air mass 1 solar energy spectra through one atmosphere thickness AM-1 may refer to: * EOS AM-1, a multi-national NASA scientific research satellite in a Sun-synchronous orbit around the Earth * Ekspress AM-1, a Russian Ekspress satellite launched on 30 October 2004 * Sega AM-1, a computer software development studio * , a 1918 U.S. Navy minesweeper * AM-1, a designation of the 1946 AM Mauler aircraft * Arp-Madore 1, a star-cluster * АМ-1, "Атом Мирный", the first civilian nuclear power reactor in the world

AM1* is a semiempirical molecular orbital technique in computational chemistry. The method was developed by Timothy Clark and co-workers (in Computer-Chemie-Centrum, Universität Erlangen-Nürnberg) and published first in 2003¹. Indeed, AM1* is an extension of AM1 molecular orbital theory and uses AM1 parameters and theory unchanged for the elements H, C, N, O and F. But, other elements have been parameterized using an additional set of d-orbitals in the basis set and with two-center core–core parameters, rather than the Gaussian functions used to modify the core–core potential in AM1. Additionally, for transition metal-hydrogen interactions, a distance dependent term is used to calculate core-core potentials rather than the constant term. AM1* parameters are now available for H, C, N, O, F, Al, Si, P, S, Cl, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Br, Zr, Mo, Pd, Ag, I and Au. AM1* is implemented in VAMP 10.0 and Materials Studio (Accelrys Software Inc.).

References

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