Accession Number:

AD0425588

Title:

COMPLEX TRANSITION METAL HYDRIDES,

Descriptive Note:

Corporate Author:

AEROSPACE CORP EL SEGUNDO CALIF

Personal Author(s):

Report Date:

1963-11-12

Pagination or Media Count:

42.0

Abstract:

A review of the properties of complex transition metal hydrides and a discussion of the probable mechanism requisite for stability are given. The absence of stoichiometric binary transition metal hydrides coupled with features common to the complex ones indicates that the primary stabilization mechanism of the transition metalhydrogen bond is one involving multiple bonding between the metal and the stabilizing ligand. The multiple bond comprises of a sigma bond, the electron pair being provided by the ligand, and a pi bond, the electron pair being provided by the metal. Thus, negative charge that would have accumulated on the metal, if only a sigma bond existed, is diminished. From a molecular orbital point of view, the pi bond permits formerly metal non-bonding d orbitals to become bonding. Thus, the total energy of the system is reduced and the stability is increased. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE