Diethyl ether dinuclear

The iron-molybdenum and iron-tungsten analogs are prepared in precisely the same manner with comparative yields of pure product. Well-formed crystals of [PPN]+ salts of the dinuclear dianion may be obtained by layering diethyl ether onto a concentrated CH3CN solution of dianion complex. 

The coordinatively unsaturated complexes are even less soluble in organic solvents such as diethyl ether, benzene, and chloroform than their saturated equivalents. The magnetic moment of copper complexes of tridentate formazans with a 2-hydroxyaryl substituent at N1 is very low (1.44 iB) compared to the expected value of copper(n) complexes with an unpaired electron and strong covalent bonding. The low solubility and magnetic moment suggest that the dimerization occurs with the formation of a saturated dinuclear complex 38. 

The X-ray crystallographic study of an early DoM reaction of lV,Af-dunethylbenzylamine with BuLi in diethyl ether hexane has allowed the identification of a tetranuclear aiylUthium clnster Li [CgH -2-(CH2NMe2)] where each Li atom is associated with three aryl carbanion carbons and one nitrogen atom [155]. When THF is added, a slow deaggregation affords a dinuclear Li2[C H -2-(CH C2)]2(THF), complex. 

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