Studies on Organolanthanide Complexes（L）——Syntheses and Crystal Structures of（CH3OCH2CH2C5H4）2 SmI and（CH3OCH2CH2C5H4）SmI2·2THF

Reactions of samarium triiodides with 2 equivalents of potassium 2-methoxyethyl-cyelopentadienyl or 1 equivalent of potassium 2-methoxyethylcyclopentadienyl in tetrehydrofuran afford bis-（2-methoxyethylcyclopentadienyl） samarium iodide complex Cp′SmI 1 （Cp′=MeOCHCHCH）,and （2-methoxyethylcyclopentadienyl） samarium diioidide complex Cp′SmI·2THF 2.Compound 1 crystallizesfrom THF/hexane in orthorhombic space group P222with cell dimensions a= 11.074（4）,b= 12.929（9）,c=12.269（4） ,V=1756.9and D=1.978 g/cmfor Z=4.The central metal Sm is coordinatedwith two Cp′ ring centroids,one iodine atom and two oxygen atoms of Cp′ forming a distorted trigonalbipyramid.The coordination number of Sm （Ⅲ） in 1 is 9.The crysal of 2 belongs to the monoclinie crystalsystem,space group P2/c with a=16.304（6）,b=8.335（2）,c=16.527（5） ,β=111.8 （1）°,V=2085.3D=2.138 g/cmand Z=4.The central metal Sm is coordinated by one Cp′ ring centroid,two iodine atoms,one oxygen atom of Cp′ and two oxygen atoms of THF forming a distorted octahedron.The coordination number of Sm （Ⅲ） in 2 is 8.