Rhenium-bismuth carbonyl cluster compounds.
作者： Richard D. Adams , William C. Pearl
DOI: 10.1021/IC901176X
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摘要: The reaction of Re(2)(CO)(8)[mu-eta(2)-C(H)=C(H)Bu(n)](mu-H) with BiPh(3) in heptane solvent at reflux yielded three new compounds Re(2)(CO)(8)(mu-BiPh(2))(2), 1 (14% yield), [Re(CO)(4)(mu-BiPh(2))](3), 2 (5% and Re(2)(eta(6)-C(6)H(5)Ph)(CO)(7), 3, 4.7 mg (7% yield). Compound contains two Re(CO)(4) groups joined by bridging BiPh(2) ligands a four-membered ring. There is no Re-Re bond 1, Re...Re = 4.483(1) A. six-membered Re(3)Bi(3) ring twist-boat conformation. When heated to 110 degrees C toluene, compound was transformed into the heterocycle (8% known Re(CO)(5)Ph, 4 (25% Re(2)(CO)(8)(mu-BiPh)(2), 5 (4% BiPh bond, 3.1006(18) an octane solution, it converted compounds: cis-Re(4)(CO)(16)(mu-BiPh(2))(2)(mu(4)-BiPhBiPh), cis-6 trans-Re(4)(CO)(16)(mu-BiPh(2))(2)(mu(4)-BiPhBiPh), trans-7 small amount (3% are isomers. Both contain fused Re(2)Bi(3) rings that share quadruply BiPhBiPh ligand Bi-Bi bond; 3.0237(7) A 2.9765(3) trans-7. phenyl on have cis-orientation they trans-orientation. In presence visible light, yet another isomer Re(4)(CO)(16)(mu-BiPh(2))(2)(mu-BiBiPh(2)), 8, shift one neighboring bismuth atom. 8 rings, five-membered ring, Re(2)Bi(2)
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