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Alkylmagnesium Complexes with the Rigid dpp‐bian Ligand {dpp‐bian = 1,2‐Bis[(2,6‐diisopropylphenyl)imino]acenaphthene}
Author(s) -
Fedushkin Igor L.,
Morozov Alexander G.,
Hummert Markus,
Schumann Herbert
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.200700816
Subject(s) - chemistry , acenaphthene , magnesium , ligand (biochemistry) , medicinal chemistry , molecule , diethyl ether , ether , stereochemistry , crystallography , organic chemistry , receptor , biochemistry , pyrene
The reactions between equimolar amounts of (dpp‐bian)Na(Et 2 O) x ( 1 ) {dpp‐bian = 1,2‐bis[(2,6‐diisopropylphenyl)imino]acenaphthene} and MeMgBr, EtMgBr and Me 3 SiCH 2 MgCl in Et 2 O afford the corresponding alkylmagnesium complexes [(dpp‐bian)MgMe] 2 ( 2 ), (dpp‐bian)MgEt(Et 2 O) ( 3 ) and (dpp‐bian)MgCH 2 SiMe 3 (Et 2 O) ( 4 ), respectively. Compound 2 and t BuOH react with elimination of methane and the formation of [(dpp‐bian)MgO t Bu] 2 ( 5 ). Compounds 2 – 5 , all of which contain the dpp‐bian ligand in its radical monoanionic form, were characterised by elemental analysis, IR spectroscopy, as well as by single‐crystal X‐ray diffraction. Molecular structure determination revealed that the magnesium atoms in 2 – 5 are four‐coordinate. The magnesium atoms of complexes 2 and 5 reach the coordination number four by dimerisation through bridging Me and t BuO groups, respectively, whereas compounds 3 and 4 reach it by coordination of one molecule of diethyl ether.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2008)