Organometallic complexes for non-linear optics XII. Syntheses and second-order susceptibilities of (neomenthyldiphenylphosphine) gold σ-arylacetylides: X-ray crystal structures of Au( C≡CPh) (nmdpp) and Au((E)-4,4′-C≡CC₆H₄CH=CHC₆H₄NO₂)(nmdpp)

Abstract

The series of complexes Au(C≡CR)(nmdpp) (R = Ph (2), 4-C6H4NO2 (3), 4,4′-C6H4C6H4NO2 (4), (Ε)-4,4′-C6H4CH=CHC6H4NO2 (5), (Ζ)-4,4′-C6H4CH=CHC6H4NO2 (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 presence of trace amounts of a phosphine oxide, and complexes 2 and 5 have been structurally characterized. Complexes 2-8 and analogous (triphenylphosphine)gold acetylides and precursor (phosphine)gold chlorides have been examined for their second-order bulk susceptibilities χ(2) by the Kurtz powder technique, with the largest response (ca. 2 × urea) being that from 3. Show more