The crystal structure of the title compound C8H16CuN8Ni has been determined
by single crystal X-ray diffraction. The crystal is triclinic with space g
roup P1, a = 6.494(3), b = 7.270(4), c = 7.936(5) Angstrom, alpha = 106.67(
3), beta = 91.33(4), gamma = 106.80 (6)degrees, V = 341.3(3) Angstrom(3), Z
= 1, M-r = 346.54, F (000) = 117, mu = 2.933mm(-1), D-c = 1.686 Mg/m(3). T
he final R factor is 0.0603 for 1214 unique observed reflections [I greater
than or equal to 2 sigma(I)]. The structure consists of [Cu(en)(2)](2+) (e
n = ethylenediamine) cations and [Ni(CN)(4)](2-) anions linked together by
two of the CN groups (the remaining two act as unidentate ligands) to form
infinite chains, in the chain, the hydrogen bonds of N(4)... H-N(5) exist,w
ith distance 3.148 Angstrom, at the same time the hydrogen bonds of N(4)...
H-N(7a) and N(5)-H ... N(1a) (a: x-1, y-1, z-1) between the interchains al
so exist, with distances of 3.160 and 3.124 Angstrom, so it forms a three-d
imensional structure of the title compound.