Electronic Raman transitions from the vanadium(III) hexa-aqua cation, in guanidinium vanadium sulphate

Electronic Raman transitions ((3)A --> E-3(C-3)) have been observed between the trigonally split components of the T-3(1g)(O-h) ground term of the van adium(III) hexa-aqua cation in guanidinium vanadium sulphate hexa-hydrate. The magnitude of the trigonal field splitting is considerable, similar to 2 720 cm(-1), which is consistent with expectations based on the stereochemis try of the [V(OH2)(6)](3+) complex. It is shown that a satisfactory reprodu ction of the electronic Raman band profile can be obtained only by assuming a ((3)A circle plus E-3) circle times e vibronic coupling model. (C) 2001 Elsevier Science B.V. All rights reserved.