Syntheses and structures of a four-co-ordinate monomeric dialkylaluminium complex and a cyclic trimeric alkylaluminium propeller complex with a bidentate amide ligand, Al(PhNCH2CH2NH2)Me2and [Al(µ-PhNCH2CH2NH)Me]3
摘要:
The reaction of AlMe(3) with N-phenylethylenediamine in toluene at 0 degrees C yielded a mononuclear complex Al(PhNCH(2)CH(2)NH(2))Me(2) 1 as the major product and a trinuclear cyclic complex [Al(mu-PhNCH(2)CH(2)NH)Me](2) 2 as a minor product. The trinuclear complex was obtained as the major product when the reaction was carried out at 25 degrees C. The crystal structure of 1 and a cis isomer of 2. where all three methyl groups on the aluminium centres occupy the cis-axial positions of a chair conformation, have been determined by single-crystal X-ray diffraction analysis. Compound 1 can be converted into 2 either by heating or by allowing the solution to stand at 23 degrees C for a few days. Crystal data: 1, orthorhombic, space group P2(1)2(1)2(1), a = 10.304(3), b = 13.172(5), c = 8.552(3) Angstrom, Z = 4; 2, trigonal, space group pg (no. 147, hexagonal setting), a = b = 16.441(7), c = 11.184(3) Angstrom, Z = 2.
Syntheses and structures of a four-co-ordinate monomeric dialkylaluminium complex and a cyclic trimeric alkylaluminium propeller complex with a bidentate amide ligand, Al(PhNCH2CH2NH2)Me2and [Al(µ-PhNCH2CH2NH)Me]3
摘要:
The reaction of AlMe(3) with N-phenylethylenediamine in toluene at 0 degrees C yielded a mononuclear complex Al(PhNCH(2)CH(2)NH(2))Me(2) 1 as the major product and a trinuclear cyclic complex [Al(mu-PhNCH(2)CH(2)NH)Me](2) 2 as a minor product. The trinuclear complex was obtained as the major product when the reaction was carried out at 25 degrees C. The crystal structure of 1 and a cis isomer of 2. where all three methyl groups on the aluminium centres occupy the cis-axial positions of a chair conformation, have been determined by single-crystal X-ray diffraction analysis. Compound 1 can be converted into 2 either by heating or by allowing the solution to stand at 23 degrees C for a few days. Crystal data: 1, orthorhombic, space group P2(1)2(1)2(1), a = 10.304(3), b = 13.172(5), c = 8.552(3) Angstrom, Z = 4; 2, trigonal, space group pg (no. 147, hexagonal setting), a = b = 16.441(7), c = 11.184(3) Angstrom, Z = 2.