Synthesis of fluoroalkoxide trirhenium(III) clusters
摘要:
The cluster Re-3(P-Cl)(3)Cl-6(THF)(3) reacted at room temperature in THF with 5 equivalents of NaOCMe(CF3)(2) to give [Na(THF)(2)][Re-3(mu-Cl)(3)Cl-2{OCMe(CF3)(2)}(5)]. The salt [Na(THF)(2)][Re-3(mu-Cl)(3)Cl-2{OCMe(CF3)(2)}(5)] reacted with a large excess of pyridine to produce Re-3(mu-Cl)(3)Cl-2[OCMe(CF3)(2)](4)(py)(2), which was isolated as a crystalline mixture of two isomers. The mono-pyridine adduct Re-3(mu-Cl)(3)Cl-2[OCMe(CF3)(2)](4)(py) was observed as a side product in reactions between the salt and pyridine. The mono-pyridine adduct Re-3(mu-Cl)(3)Cl-2[OCMe(CF3)(2)](4)(py) and one of the two isomers of the di-pyridine adduct Re-3(mu-Cl)(3)Cl-2[OCMe(CF3)(2)](4)(py)(2) were characterized by X-ray crystallography. The other isomer of Re-3(mu-Cl)(3)Cl-2[OCMe(CF3)(2)](4)(py)(2) and [Na(THF)(2)][Re-3(mu-Cl)(3)Cl-2{OCMe(CF3)(2)}(5)] were identified by X-ray crystallography but the structures were not fully refined. (c) 2005 Elsevier B.V. All rights reserved.