An unprecedented tetranuclear niobium aqua ion with a capping mu4-sulfido ligand.
The aqueous solution chemistry of niobium is rather unexplored, and well characterized aqua complexes are scarce. In this work, a new niobium aqua ion is obtained upon treatment of Zn-reduced ethanolic solutions of NbCl5 with HCl in the presence of a sulfide source. The red aqua ion, obtained upon cation-exchange chromatography, forms readily the thiocyanate complex which has been crystallized as Cs(4.26)Na(1.74)[Nb4SO5(NCS)10] . 0.33H2O. X-ray crystallography revealed an unprecedented metal-metal bonded tetranuclear Nb4(mu4-S)(mu2-O)5(4+) core with a capping mu4-S ligand.
Ooi
Bee-Lean
BL
Department of Chemistry, Technical University of Denmark, Kemitorvet, Building 207, 2800 Kgs. Lyngby, Denmark. obl@kemi.dtu.dk
Søtofte
Inger
I
Bendtsen
Maja F
MF
Munch
Astrid
A
Nielsen
Loa C
LC
Henriksen
Jonas
J