Gold and platinum benzenehexathiolate complexes as large templates for the synthesis of 12-coordinate polyphosphine macrocycles
摘要:
A general strategy for the synthesis of large-ring, poly-donor macrocycles using multi-metal ion templates is outlined. This strategy is illustrated in the design and synthesis of the hexanuclear (divinyl)(phenyl)phosphine gold complex of benzenehexathiolate, {[(C2H3)(2)(Ph)P]Au}(6)(C6S6) (1), which undergoes macrocycle formation upon reaction with PhPH2 in the presence of AIBN (Scheme 1). NMR spectra (H-1 and P-31) and elemental analyses indicate that the resulting macrocycle is a 36-membered ring containing 12 phosphorus donors, six of which are coordinated to the six Au atoms in the Au-6(C6S6) core. A series of tri-platinum complexes, (P boolean AND P)Pt](3)(C6S6) (16-19), where (P boolean AND P) is a bidentate phosphine ligand, with three (P boolean AND P)Pt-II units coordinated to a C6S66- core, were also prepared as models for templated formation of other poly-phosphorus macrocycles. (C) 2000 Elsevier Science S.A. All rights reserved.
Gold and platinum benzenehexathiolate complexes as large templates for the synthesis of 12-coordinate polyphosphine macrocycles
摘要:
A general strategy for the synthesis of large-ring, poly-donor macrocycles using multi-metal ion templates is outlined. This strategy is illustrated in the design and synthesis of the hexanuclear (divinyl)(phenyl)phosphine gold complex of benzenehexathiolate, {[(C2H3)(2)(Ph)P]Au}(6)(C6S6) (1), which undergoes macrocycle formation upon reaction with PhPH2 in the presence of AIBN (Scheme 1). NMR spectra (H-1 and P-31) and elemental analyses indicate that the resulting macrocycle is a 36-membered ring containing 12 phosphorus donors, six of which are coordinated to the six Au atoms in the Au-6(C6S6) core. A series of tri-platinum complexes, (P boolean AND P)Pt](3)(C6S6) (16-19), where (P boolean AND P) is a bidentate phosphine ligand, with three (P boolean AND P)Pt-II units coordinated to a C6S66- core, were also prepared as models for templated formation of other poly-phosphorus macrocycles. (C) 2000 Elsevier Science S.A. All rights reserved.