ISSN:
1573-8779
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The crystal structure was determined for Nb2S4(S2NCEt2)4 obtained in 48% yield by the reaction of Cs4Nb2S4(NCS)8 with NaS2CNEt2 in water: a=21.181(8), b=6.958(1), c=16.623(6) Å, β=133.95(2)o, V = 1764(1) Å3, space group C2/m, Z=2, dcalc=1.708 g/cm3. The measurements were carried out on a Syntex P21 diffractometer with CuKα radiation. A total of 2536 reflections were measured, of which 990 were used, Raniso=0.0444. The basic fragment in this molecule is [Nb2(μ2−S2)2]4+, the Nb−Nb distance in which corresponds to a metal-metal single bond. The molecule is partially disordered over two positions about the twofold axis and mirror plane of the C2/m space group. The dithiocarbamate and disulfide ligands with bidentate coordination form a distorted square antiprism about each of the niobium atoms as in NbS2Cl2. The anomalously large S−S bond length in the S2 ligand [2.282(5) Å] may be attributed to inaccuracy in the determination due to disorder.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00761483
Permalink