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Organometallic Diaza‐dimetalla‐Norbornanes and ‐Cyclohexanes of Aluminium, Gallium and Indium
Author(s) -
Tian Xin,
Fröhlich Roland,
Mitzel Norbert W.
Publication year - 2005
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.200400552
Subject(s) - chemistry , dimer , gallium , ring (chemistry) , crystallography , crystal structure , metal , indium , monomer , single crystal , group 2 organometallic chemistry , medicinal chemistry , polymer chemistry , organic chemistry , molecule , polymer
Selective formation of 1,3,3,4,6,6‐hexamethyl‐1,4‐diaza‐3,6‐diinda‐norborane was achieved by the reaction of bis(lithiomethyl‐methylamino)methane with dimethylindium chloride by simultaneous formation of two dative metal‐carbon and two metal‐nitrogen bonds accompanied by two ring closures. The synthesis of heterometallic compounds of this type, namely 1,3,3,4,6,6‐hexamethyl‐3‐alumina‐1,4‐diaza‐6‐galla‐norborane [Me 2 AlCH 2 N(Me)]CH 2 [N(Me)CH 2 GaMe 2 ], was also attempted by the reaction of bis(lithiomethyl‐methylamino)methane with dimethylaluminium and ‐gallium chloride. This compound is formed, but cannot be separated from the simultaneously formed homometallic compounds [Me 2 MCH 2 N(Me)] 2 CH 2 (M = Al, Ga). The compounds were identified by elemental analyses, mass spectra, NMR spectroscopy ( 1 H, 13 C), and by determination of their crystal structures in which they are present as monomers. The norbornane‐like structure is favoured over potential isomers containing three‐membered rings and over polymeric aggregation in both compounds. In addition, the crystal structure of dimethyl(dimethylaminomethyl)indium was determined by single crystal X‐ray diffraction, which shows an intermolecular aggregation into a six‐membered ring dimer.