Dy. Noh et al., X-RAY-ABSORPTION SPECTROSCOPIC (XAS) STUDY OF NICKEL BISDITHIOLENES, (N-BU(4)N)(X)[NI(DMBIT)(2)] (X=2, 1, 0.29) AND (N-BU(4)N)[NI(DMBBIP)(2)], Polyhedron, 16(8), 1997, pp. 1351-1355
X-ray absorption near-edge structure (XANES) and extended X-ray absorp
tion fine structure (EXAFS) studies on the tetra(n-butyl)ammonium salt
of [Ni(dmbit)(2)](x-) (x = 2,1 and 0.29) and [Ni(dmbbip)(2)](-) have
been performed in order to reveal the structural parameters of the [Ni
S4](x-) core along with the chemical state. The central nickel ion is
confirmed to have coordination number four with square-planar geometry
. The [Ni-S] bond distance in [Ni(dmbit)(2)](-) (2.154 Angstrom) is id
entical with that of [Ni(dmbbip)(2)](-), but shorter than those of [Ni
(dmbit)(2)](2-) (2.178 Angstrom) and [Ni(dmbit)(2)](0/29-) (2.165 Angs
trom). Copyright (C) 1997 Elsevier Science Ltd.