113585-08-3Relevant academic research and scientific papers
Preparation and ligand properties of thionylimino derivatives of arsenic(III). X-ray crystal structure of Cr(CO)5(Ph2AsNSO)
Chivers, Tristram,Dhathathreyan, Kaveripatnam S.,Lensink, Cees,Richardson, John F.
, p. 1570 - 1574 (2008/10/08)
The reactions of M+NSO- (M+ = K+ or (Me2N)3S+) with Ph2AsCl or RAsCl2 in acetonitrile produce Ph2AsNSO (1) or RAs(NSO)2 (R = t-Bu (2a), Ph (2b)). Treatment of Cr(CO)5(THF) with 1 or 2 gives Cr(CO)5(Ph2AsNSO) (3) or Cr(CO)5[RAs(NSO)2] (R = t-Bu (4a), Ph (4b)), respectively. An X-ray structural determination of 3 shows that the ligand adopts a cis configuration and is bonded to chromium via the arsenic atom. Crystal data: monoclinic, space group P21/c, a = 12.389(4) ?, b = 10.293 (3) ?, c = 16.031 (6) ?, β = 104.50(1)°, V = 1979.1 ?3, Z = 4. The structure was solved by Patterson techniques and refined by full-matrix least-squares techniques to give a final R = 0.056 and Rw = 0.057. The bond distances in the ligand are d(As-N) = 1.889 (6), d(N-S) = 1.496 (7), and d(S-O) = 1.457 (9) ?, and the bond angles at nitrogen and sulfur are 127.5 (4) and 120.2 (4)°, respectively. The reaction of 2b with Pt(C2H4)(PPh3)2 results in As-N bond cleavage to give cis-Pt-(PPh3)2(NSO)2 in good yield. The thermolysis of 2b produces the eight-membered ring Ph2As2S2N4. Complexes of the type cis-Cr(CO)4(R2As2S2N4) (R = t-Bu (5a), Ph (5b)) are obtained from the reaction of R2As2S2N4 and cis-Cr(CO)4(C7H8).
