Crystal structure of dimethyl-1κ(2) C-bis(μ-4-methylphenolato-1:2κ(2) O:O)(N,N,N',N'-tetramethylethylenediamine-2κ(2) N,N')indium(III)lithium(I).

The mixed bimetallic title compound, [InLi(CH3)2(C7H7O)2(C6H16N2)] or [(tmeda)Li-μ-(4-MeC6H4O)2InMe2] (tmeda is N,N,N',N'-tetra-methyl-ethylenedi-amine), exhibits a four-membered LiO2In ring core via bridging 4-methyl-phenolate groups. The Li and In atoms are in distorted tetra-hedral N2O2 and C2O2 bonding environments, respectively. The Li atom is further chelated by a tmeda group, yielding a spiro-cyclic structure.

catena-Poly[bis-[dimeth-yl(pyridine-κN)indium(III)]-μ4-benzene-1,3-diolato-bis-[di-methyl-indium(III)]-μ4-benzene-1,3-diolato].

The title compound, [In2(CH3)4(C6H4O2)(C5H5N)] or [{(CH3)2In}(1,3-O2C6H4){In(CH3)2(py)}] n , (py = pyridine) contains two crystallographically unique In(III) ions which are in distorted tetra-hedral C2O2 and distorted trigonal-bipyramidal C2O2N coordination environments. The In(III) coordination centers are bridged head-to-head via In-O bonds, yielding four-membered In2O2 rings and zigzag polymeric chains along [001].