Polarized crystal absorption spectra and electronic states of tetraethylammonium hexabromodiplatinate(II)

Journal Article · Mon Mar 01 04:00:00 EST 1976 · Inorg. Chem.; (United States)

DOI:https://doi.org/10.1021/ic50157a035· OSTI ID:7353071

Martin, Jr, D S; Rush, R M; Peters, T J

Polarized crystal electronic absorption spectra are reported at 300/sup 0/ and 15/sup 0/K for normally cleaved crystals of (N(C/sub 2/H/sub 5/)/sub 4/)/sub 2/Pt/sub 2/Br/sub 6/. The spectra provide the polarization of the transitions with respect to the three molecular axes of the Pt/sub 2/Br/sub 6//sup 2 -/ ion. The excited states have been assigned under the D/sub 2h/ point group symmetry of the ion. There is sufficient delocalization of the d electrons that both spin-forbidden and spin-allowed d reverse arrow d transitions have strongly enhanced intensities and have dipole-allowed character in contrast to the PtBr/sub 4//sup 2 -/ ion. Although the energies of d reverse arrow d transitions are similar for PtBr/sub 4//sup 2 -/ and Pt/sub 2/Br/sub 6//sup 2 -/, M reverse arrow L charge-transfer transitions occur at lower energies for the dimeric ion. The polarization of these intense transitions indicates that they correspond to electron transfers from terminal bromides. (auth)

• Research Organization: Ames Lab., IA
• OSTI ID: 7353071
• Journal Information: Inorg. Chem.; (United States), Journal Name: Inorg. Chem.; (United States) Vol. 15:3; ISSN INOCA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ABSORPTION SPECTRA
AMINES
AMMONIUM COMPOUNDS
BROMIDES
BROMINE COMPOUNDS
COMPLEXES
CRYSTAL STRUCTURE
ELECTRONIC STRUCTURE
HALIDES
HALOGEN COMPOUNDS
MEDIUM TEMPERATURE
ORGANIC COMPOUNDS
PLATINUM COMPLEXES
QUATERNARY COMPOUNDS
SPECTRA
TEMPERATURE DEPENDENCE
TRANSITION ELEMENT COMPLEXES
VERY LOW TEMPERATURE