A NEW ROUTE TO METAL-HALOGEN BOND FORMATION IN METAL-CARBONYL CLUSTERS - CRYSTAL-STRUCTURE OF THE FLUORINATED CLUSTER (MU-H)OS-3(CO)(10)(ASPH3)F

(mu-H)Os-3(Co)(10)(EPh3)[ON(CF3)(2)] (E = P, As, Sb) and (mu-H)Os-3(CO )(11)[ON(CF3)(2)] react with HX (X = F, Cl, Br, I) to afford (CF3)(2)N OH and (mu-H)OS3(CO)(10)(EPh3) (X) or (mu-H)OS3(CO)(11)(X). The reacti on of (mu-H)Os-3(CO)(10)(AsPh3)[ON(CF3)(2)] with HF gives two isomers, one of which was established from X-ray crystallography to be (mu-H)O s-3(CO)(10)(AsPh3) (F) with AsPh3 and F bonded to the same Os centre. The Os-F bond and the Os-CO bond trans to it are relatively short. (C) 1998 Elsevier Science S.A. All rights reserved.