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A Pyridine‐Stabilized Alumoxane Containing Two 1,3,2‐Diazaalumina[3]ferrocenophane Units
Author(s) -
Wrackmeyer Bernd,
Klimkina Elena V.,
Milius Wolfgang
Publication year - 2008
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.200700869
Subject(s) - chemistry , pyridine , trimethylsilyl , yield (engineering) , crystallography , bent molecular geometry , cyclophane , solid state , nuclear magnetic resonance spectroscopy , stereochemistry , spectroscopy , crystal structure , organic chemistry , metallurgy , materials science , physics , quantum mechanics
Dialuminoxane 6 , in which both aluminum atoms are coordinated by pyridine and each is part of a 1,3‐bis(trimethylsilyl)‐1,3,2‐diazaalumina[3]ferrocenophane unit, was isolated as a side product accompanying the synthesis of the corresponding [3]ferrocenophane with Al–H or Al–Cl functionalities. Although attempted high‐yield syntheses of 6 failed, its structure could be established by 1 H, 13 C, and 29 Si NMR spectroscopy in solution and by X‐ray structural analysis in the solid state. In various experiments to obtain 6 , crystalline material was isolated and identified as the desired dialuminoxane either with a linear Al–O–Al ( 6A ) or bent Al–O–Al ( 6B ) unit. This is the first example of a structurally characterized bis(amino)dialuminoxane.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)