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Metallotricycle of Lanthanide Supported by a Bridging Diamide: Syntheses and Molecular Structures of {Li(THF) 3 [LnCl( μ 2 ‐ trans ‐1,2‐(NSiMe 3 ) 2 C 6 H 10 )( μ 2 ‐Cl)]} 2 ·2THF (Ln=Yb, Nd)
Author(s) -
LU ChengRong,
LI HongHai,
ZHAO Bei,
SHEN Qi,
YAO YingMing,
ZHANG Yong
Publication year - 2007
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.200790294
Subject(s) - chemistry , lanthanide , coordination number , dilithium , crystal structure , stereochemistry , crystallography , anhydrous , medicinal chemistry , organic chemistry , deprotonation , ion
Abstract The reactions of dilithium salt of trans ‐1,2‐bis(trimethylsilylamino)cyclohexane with anhydrous lanthanide trichlorides LnCl 3 (Ln=Yb, Nd) in THF afforded the dianionic binuclear tricycles of lanthanide chlorides {Li(THF) 3 [LnCl( µ 2 ‐ trans ‐1,2‐(NSiMe 3 ) 2 C 6 H 10 )( ( 2 ‐Cl)]} 2 ·2THF (Ln=Yb 1 , Nd 2 ) in moderate yields. Both of the bridged complexes were characterized by elemental analysis, IR spectroscopy and single‐crystal X‐ray diffraction. Crystal structural analysis shows that the two complexes are the analogues which have a tricyclic framework built by two bridged lanthanide metals, four nitrogens and four carbons from two diamide ligands. Each lanthanide metal coordinates to three nitrogen atoms and two chlorines to form a distorted trigonal bipyramid and connects with a lithium by a bridging chlorine.