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- Title
Aluminum and Indium Complexes derived from Guanidines, Triazenes, and Amidines.
- Authors
Cole, Marcus L.; Davies, Aaron J.; Jones, Cameron; Junk, Peter C.; McKay, Alasdair I.; Stasch, Andreas
- Abstract
The reaction of guanidines, triazenes, amidines, and lithium amidinates with trimethylamine alane ([AlH3(NMe3)]), lithium tetrahydridoaluminate, trimethylaluminum, aluminum trichloride, and indium trichloride is reported. Equimolar reactions utilising hindered N, N′-bis(2, 6-diisopropylphenyl)guanidines afford [{Al X2L} n] species through hydrogen elimination ( X = H) from [AlH3(NMe3)] ( n = 2) with HCGiso ( 1), HDGiso ( 2), or HDPiso ( 3) [CGiso = N, N′-bis(2, 6-disopropylphenyl)- N′′-dicyclohexylguanidinate, DGiso = N, N′, N′′-tris(2, 6-diisopropylphenyl)guanidinate, DPiso = N, N′-bis(2, 6-diisopropylphenyl)- P-2, 6-diisopropylphenylphosphguanidinate], or through methane elimination ( X = Me) from AlMe3 [ n = 1, L = CGiso ( 5)]. The analogous reactions of the triazene HTiso with LiAlH4 and AlMe3 selectively afford [AlH(Tiso)2] ( 4) and [AlMe2(Tiso)] ( 6), respectively [Tiso = 1, 3-bis(2, 6-diisopropylphenyl)triazenide]. Reactions of N, N′-bis(aryl)formamidines/ates with half an equivalent of AlMe3/AlCl3 result in [Al XL2] complexes [ X = Me; L = Fxy ( 7) or Fet ( 8); X = Cl; L = Fet ( 9) or L = Fiso ( 10)] [Fxy = N, N′-bis(2, 6-dimethylphenyl)formamidinate, Fet = N, N′-bis(2, 6-diethylphenyl)formamidinate, Fiso = N, N′-bis(2, 6-diisopropylphenyl)formamidinate]. Treatment of 1 with one equivalent of I2 yields [AlI2(CGiso)] ( 11). Attempts to prepare [InCl2L] congeners of 11 with L = Fxy and Fet led to the isolation of prodigious quantities of [InCl3(HFxy)2] ( 12) and [InCl2(Fet)(HFet)] ( 13) due to adventitious water. The X-ray crystal structures of 1- 13 are reported.
- Subjects
ALUMINUM; INDIUM; COMPLEX compounds; TRIAZENES; GUANIDINES; CHEMICAL derivatives
- Publication
Zeitschrift für Anorganische und Allgemeine Chemie, 2015, Vol 641, Issue 12/13, p2233
- ISSN
0044-2313
- Publication type
Article
- DOI
10.1002/zaac.201500556