New structural study and reinterpretation of the vibrational spectra of the mu-N,O-hyponitrite bis[pentaamminecobalt(III)](4+) cation

摘要

The [(NH3)(5)CoN(O)NOCo(NH3)(5)]Br-2(NO3)(2) (.) 2.5H(2)O salt was studied by X-ray diffraction methods. Such structural study confirmed the already reported binuclear, bridged structure of the complex cation and allowed a description of the main features of the lattice structure. An infrared and Raman study of that compound was also performed in order to revise the assignments of the vibrational features. Such spectroscopic study, aided by N-14/15 replacement and quantum chemistry calculations, permitted a reassignment of the spectral bands originated in the hyponitrite bridge. (c) 2005 Elsevier B.V. All rights reserved.