Acta Crystallographica Section C

Crystal Structure Communications

Volume 69, Part 10 (October 2013)

metal-organic compounds

Acta Cryst. (2013). C69, 1120-1123    [ doi:10.1107/S0108270113023135 ]

Aluminium(III) amidinates formed from reactions of `AlCl' with lithium amidinates

D. H. Mayo, Y. Peng, P. Zavalij, K. H. Bowen and B. W. Eichhorn

Abstract: The disproportionation of AlCl(THF)n (THF is tetra­hydro­furan) in the presence of lithium amidinate species gives aluminium(III) amidinate complexes with partial or full chloride substitution. Three aluminium amidinate complexes formed during the reaction between aluminium mono­chloride and lithium amidinates are presented. The homoleptic complex tris­(N,N'-diiso­propyl­benz­imid­amido)­aluminium(III), [Al(C13H19N2)3] or Al{PhC[N(i-Pr)]2}3, (I), crystallizes from the same solution as the heteroleptic complex chlorido­bis(N,N'-diiso­propyl­benz­imid­amido)­aluminium(III), [Al(C13H19N2)2Cl] or Al{PhC[N(i-Pr)]2}2Cl, (II). Both have two crystallographically independent mol­ecules per asymmetric unit (Z' = 2) and (I) shows disorder in four of its N(i-Pr) groups. Changing the ligand substituent to the bulkier cyclo­hexyl allows the isolation of the partial THF solvate chlorido­bis­(N,N'-di­cyclo­hexyl­benz­imid­amido)­aluminium(III) tetra­hydro­furan 0.675-solvate, [Al(C19H27N2)2Cl]·0.675C4H8O or Al[PhC(NCy)2]2Cl·0.675THF, (III). Despite having a two­fold rotation axis running through its Al and Cl atoms, (III) has a similar mol­ecular structure to that of (II).

Formula: [Al(C13H19N2)3], [Al(C13H19N2)2Cl] and [Al(C19H27N2)2Cl]·0.675C4H8O

Keywords: crystal structure; aluminium(III) amidinates; disorder.

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Structure factor file (CIF format) (807.6 kbytes)
[ doi:10.1107/S0108270113023135/ky3026AlPhCNiPr23sup2.hkl ]
Contains datablock AlPhCNiPr23

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Structure factor file (CIF format) (582.7 kbytes)
[ doi:10.1107/S0108270113023135/ky3026AlPhCNiPr22Clsup3.hkl ]
Contains datablock AlPhCNiPr22Cl

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Structure factor file (CIF format) (221.6 kbytes)
[ doi:10.1107/S0108270113023135/ky3026AlPhCNCy22Clsup4.hkl ]
Contains datablock AlPhCNCy22Cl


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