98194-74-2Relevant academic research and scientific papers
Synthetic approaches to macromolecules containing the bis(μ6-naphthalene)metal moiety
Francis, Colin G.,Morand, Pascale D.,Spare, Nicholas J.
, p. 1958 - 1964 (2008/10/08)
A poly[(dimethylsiloxane)-co-(2-naphthoxymethylsiloxane)], 5, has been synthesized from either (chloromethyl)heptamethylcyclotetrasiloxane (1) or poly(dimethylsiloxane). The synthetic procedures also permit the preparation of the corresponding 1- or 2-naphthoxyheptamethylcyclotetrasiloxane, 4 (a and b), starting from 1. These siloxanes react with Cr or V vapors to afford poly- or cyclosiloxane bound bis(η6-naphthalene)metal complexes. In contrast, reaction with Ti leads to attack on the siloxane and no bis(arene) complex is observed. Using cyclosiloxane 4b as a model for the polymer 5 in macroscale metal vapor reactions, it is found that chromium coordinates exclusively to the nonsubstituted ring. The chromium complexes of 4b and 5 exhibit very similar ligand displacement chemistry although some differences from that of (η6-C10H8)2Cr are noted. Thus reaction with CO leads to the analogous (arene)Cr(CO)3 complexes while RNC (R = tert-butyl or cyclohexyl) affords the corresponding Cr(CNR)6 species.
