CRYSTAL-STRUCTURES OF ARYLOXIDE COMPLEXES OF ZINC EMBRACING SODIUM ARYL GROUP-INTERACTIONS - NA[ZN(2,6-DIPHENYLPHENOXIDE)(3)(H2O)] AND N-2(2,6-DIISOPROPYLPHENOXIDE)(4)CL]CENTER-DOT-3THF

The addition of Na(2,6-diphenylphenoxide) to a diethyl ether solution of the monomeric Zn( 2,6-diphenylphenoxide)(2)(THF)(2) derivative affo rds the trisphenoxide complex, Na[Zn(2,6-diphenylphenoxide)(3)(H2O)] ( 1). An X-ray crystal structure analysis of 1 reveals the zinc to posse ss a distorted tetrahedral geometry and that the sodium counterion is essentially six-coordinate, being bound to the three oxygen atoms of t he aryloxide ligands and the aromatic carbon atoms of one of the pheny l substituents on each of these ligands. An additional zinc phenoxide complex, Na[Zn,(2,6-diisopropylphenoxide)(4)Cl]. 3THF (2), was obtaine d during the synthesis of Zn(2,6-diisopropylphenoxide)(2)(THF)(2) in t he presence of NaCl. The X-ray structure of 2 again shows the sodium i n to be six-coordinate, involved in an eta(6)-interaction with the phe noxide pi-system and bound to two THF ligands and a chloride ion. (C) 1998 Elsevier Science S.A. All rights reserved.