Synthesis and Characterization of Metal Tribromoacetates and Their Alkali Metal Derivatives

Table 8

Infrared Spectral Bands (cm⁻¹) of [(Me₄N)₂] [M(CBr₃COO)₄], where M = Co(II), Ni(II), Mn(II), and Cu(II).

[(Me4N)2]	[(Me4N)2]	[(Me4N)2]	[(Me4N)2]	Assignments
[Mn(CBr3COO)4]	[Co(CBr3COO)4]	[Ni(CBr3COO)4]	[Cu(CBr3COO)4]
1685 s	1680 s	1680 s	1685 s	COO asym. Str.
1425 m	1420 s	1420 s	1425 m	COO sym. Str.
1190 m	1195 s	1200 s	1205 m	CBr3 str.
1160 vw	1165 sh	1170 sh	1170 w	CBr3 str.
1100 w	1105 m	1105	1170 w	CBr3 str.
1490 s	1485 s	1488 s	1485 s	Band due to
945 s	945 s	950 s	945 s	Me4N^+group
835 s	830 m	830 s	835 s	C–C str.
800 s	795 s	800 s	975 s
725 s	725 s	725 s	730 s	OCO deform.
630 s	—	630 w	630 s	CBr3 bend
540 vw	535 w	—	545 vw	CBr3 bend
465 vw	460 m	465 w	470 w	M–O
265 m	270 m	270 m	270 m	CBr3 Wag.