Abstract
Reaction of K3Na[MO2(CN)4]·6H2O (M = Mo or W) with 2,2′-bipyridyl (bipy) in water–methanol solution (pH 8.4) affords the new compounds [AsPh4][MO(bipy)(CN)3]·0.5bipy·2H2O. The structure of the tungsten complex was determined by X-ray analysis. Principal dimensions (ranges or means; estimated standard deviation 0.005 A) are: WO 1.735, W–C 2.129–2.149, W–N 2.149 and 2.307 A. The crystals are triclinic, space group P, a= 10.035(3), b= 12.829(5), c= 15.732(5)A, α= 76.00(3), β= 84.00(3), γ= 88.30(3)°, Z= 2, R= 0.069 for 6 104 observed [I/σ(I) 2.0] reflections. Tungsten is six-co-ordinated with oxygen and cyano ligands trans to the bidentate bipy. The structure contains ‘free’ bipy which links the complex anions in chains via hydrogen-bonded water molecules. The i.r. spectra of the solids are in agreement with this structure as are the n.m.r. (1H and 13C) spectra. The visible spectra in various organic solvents are dominated by metal-to-ligand charge-transfer bands with absorption maxima that are linearly dependent on the Gutmann acceptor number of the solvent.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
