SUBJECTS triangular numbers

A. AH2 Molecules, inclnding H3.—The simplest of these species is H, which has been the subject of a number of recent studies. Work previous to 1970 is listed by Borkman.426 The ground state is triangular (Dsn) and it has been studied using a basis set of elliptical orbitals. Contracted GTO basis sets were used in near-HF calculations by Harrison et a/.,430 and correlated wavefunctions were computed by Salmon and Poshusta,431 and by Handy.482 In the latter calculation a new form for the correlation factor was used, and the good results suggest that it might be useful for other small molecules. 

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