ISSN:
1572-8862
Keywords:
heterometallic
;
hydride
;
cluster
;
rhenium
;
coinage metal
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract This contribution presents a study of the reactions of ReH3(CO)(PMe2Ph)3 (1) with a variety of metallic Lewis acids of the coinage metals to form hydrido-bridged heterometallic rhenium-gold, rhenium-silver, and rhenium-copper complexes. The reaction of 1 with AuCl(PPh3) proceeds with elimination of hydrogen to give the hydrido-bridged heterobinuclear rhenium-gold complex (PMe2Ph)3(CO)ClRe(μ-H)Au(PPh3) (2). In contrast, the reactions of 1 with AgPF6, [Cu(CH3CN)4]PF6 or CuCl proceed without elimination of hydrogen to give the hydrido-bridged heterotrinuclear rhenium-silver and rhenium-copper complexes [(PMe2Ph)3(CO)HRe(μ-H)2M(μ-H)2ReH(CO)(PMe2Ph)3]PF6 (M=Ag (3), Cu (4)) and the hydrido-bridged heterotetranuclear rhenium-copper complex (PMe2Ph)3(CO)HRe(μ-H)2Cu(μ-Cl)2Cu(μ-H)2ReH(CO)(PMe2Ph)3 (5), respectively. The molecular structures of compounds 2 and 3 have been determined by single-crystal X-ray diffraction studies. Crystallographic data for 2: monoclinic, space group P212121, a=12.804(2) Å, b=13.512(2) Å, c=24.312(3) Å, V=4206(1) Å3, Z=4, and R=0.042. Crystallographic data for 3: monoclinic, space group C2/c, a=24.212(6) Å, b=13.098(3) Å, c=20.177(5) Å, b=116.40(2)°, V=5732(2) Å3, Z=4, and R=0.044. The X-ray crystal structure of 2 exhibits a short contact (2.798(12) Å) between the gold atom and the CO ligand that is primarily bound to the adjacent rhenium atom, suggesting an incipient semibridging relationship.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1023/A:1009073017138
Permalink