Normal coordinate analysis and spectral band assignments for the in-plane infrared active vibrations of diaquo tetra-acetato dichromium (II) complex

Abstract

 The 29 in-plane infrared active normal modes of diaquo tetra--acetato dichromium (II) complex have been described and their frequencies of vibration calculated by normal coordinate analysis. On the basis of these calculations, 25 bands in the infrared spectrum of the complex have been assigned to the in-plane
 modes. The remaining 4 bands were predicted to fall out of the range of our investigation. However, 6
 accidental degeneracies were identified thus reducing the total number of assigned bands to actually be 19. Furthermore, the values of the forces constants of COO and bridging Cr-O bonds in Cr₂(O₂CCH₃)₄(H₂O)₂ complex and Cr₂(O₂CH)₄(H₂O)₂ previously reported suggest that the strengths of
 these bonds are inversely related