Hydrogen-Bonded Networks Based on Cobalt(II), Nickel(II), and Zinc(II) Complexes of N,N'-Diethylurea

Table 10

Most characteristic and diagnostic IR fundamentals (cm^-1) for DEU and complexes 1–4.^a

Assignments	DEU	1	2	3	4
ν(NH)	3342 sb	3332 sb	3332 sb	3328 sb	3340 sb
ν(CH)	2973 s, 2932 m,	2976 s, 2934 m,	2972 s, 2934 m,	2976 m, 2934 w,	2972 s, 2932 m,
	2874 m	2878 m	2876 w	2876 w	2876 w
as(CN)amide+𝛿asν(NH)	1625 vs	1576 vs	1570 vs	1570 vs	1582 vs
ν(CO)	1586 vs	1626 vs	1628 vs	1636 vs	1624 vs
𝛿s(NH)	1540 m sh	1454 m	1452 w	1450 m	1456 w
𝛿as(NH) + as(CN)amideν	1259 m	1338 m	1338 w	1334 w	1334 w

^aKBr pellets.