ORGANOMETALLIC COMPLEXES FOR NONLINEAR OPTICS .12. SYNTHESES AND 2ND-ORDER SUSCEPTIBILITIES OF (NEOMENTHYLDIPHENYLPHOSPHINE) GOLD SIGMA-ARYLACETYLIDES - X-RAY CRYSTAL-STRUCTURES OF AU(C-CPH)(NMDPP) AND AU((E)-4,4'-C-CC6H4CH=CHC6H4NO2)(NMDPP)

The series of complexes Au(C=CR)(nmdpp) (R = Ph (2), 4-C6H4NO2 (3), 4, 4'-C6H4C6H4NO2 (4), (E)-4,4'-C6H4CH=CHC6H4NO2 (5), (Z)-4,4'-C6H4CH=CHC 6H4NO2 (6), 4,4'-C6H4C=CC6H4NO2 (7), 4,4'-C6H4N=CHC6H4NO2 (8); nmdpp = (+)-neomenthyldiphenylphosphine) has been synthesized by reaction of AuCl(nmdpp) with the corresponding acetylene and methoxide in the pres ence of trace amounts of a phosphine oxide, and complexes 2 and 5 have been structurally characterized. Complexes 2-8 and analogous (triphen ylphosphine)gold acetylides and precursor (phosphine)gold chlorides ha ve been examined for their second-order bulk susceptibilities chi((2)) by the Kurtz powder technique, with the largest response (ca. 2 x ure a) being that from 3. (C) 1997 Elsevier Science S.A.