TY - JOUR
T1 - Preparation and characterization of cobalt(III) complexes containing 1,1,1-tris(dimethylphosphinomethyl)ethane (mmtp), and the crystal structure of [Co(mmtp)2][Co(CN)6] · 2.25H2O
AU - Ando, Tadashi
AU - Kita, Masakazu
AU - Kashiwabara, Kazuo
AU - Fujita, Junnosuke
AU - Kurachi, Saeko
AU - Ohba, Shigeru
PY - 1992/10/1
Y1 - 1992/10/1
N2 - Eight new cobalt(III) complexes of the type, [CoX3(mmtp)]n+ (mmtp= 1,1,1-tris(dimethylphosphino-methyl)ethane, X3=(Cl)3, (Br)3, (CN)3, (NH3)3 mmtp, 3-azapentane-1,5-diamine (dien), 1,4,7-triazacyclononane (tacn), and 1,4,7-trithiacyclononane (ttcn)), were prepared and characterized. All of the complexes are stable in the solid state, but the halogeno complexes aquate rapidly in water, and the ammonia complex liberates NH3 slowly in 1 mol dm-3 HCl to give [CoCl2(NH3)(mmtp)]+, other complexes including [Co(mmtp)2]3+ being stable in solution. The crystal structure of [Co(mmtp)2][Co(CN)e] · 2.25H2O was determined by X-ray analysis. Crystal data: orthorhombic, space group Pca21, a=31.579(5), b=10.521(1), c=23.458(3) Å, V=7794(2) Å3, Z=8, R=0.084 for 4196 reflections. The Co-P bond distances are 2.291(9)-2.357(7) Å (av 2.331 Å), which are appreciably longer than those usually found in Co(III)-phosphine complexes. The absorption spectra of the complexes were compared with one another and with those of the related complexes.
AB - Eight new cobalt(III) complexes of the type, [CoX3(mmtp)]n+ (mmtp= 1,1,1-tris(dimethylphosphino-methyl)ethane, X3=(Cl)3, (Br)3, (CN)3, (NH3)3 mmtp, 3-azapentane-1,5-diamine (dien), 1,4,7-triazacyclononane (tacn), and 1,4,7-trithiacyclononane (ttcn)), were prepared and characterized. All of the complexes are stable in the solid state, but the halogeno complexes aquate rapidly in water, and the ammonia complex liberates NH3 slowly in 1 mol dm-3 HCl to give [CoCl2(NH3)(mmtp)]+, other complexes including [Co(mmtp)2]3+ being stable in solution. The crystal structure of [Co(mmtp)2][Co(CN)e] · 2.25H2O was determined by X-ray analysis. Crystal data: orthorhombic, space group Pca21, a=31.579(5), b=10.521(1), c=23.458(3) Å, V=7794(2) Å3, Z=8, R=0.084 for 4196 reflections. The Co-P bond distances are 2.291(9)-2.357(7) Å (av 2.331 Å), which are appreciably longer than those usually found in Co(III)-phosphine complexes. The absorption spectra of the complexes were compared with one another and with those of the related complexes.
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U2 - 10.1246/bcsj.65.2748
DO - 10.1246/bcsj.65.2748
M3 - Article
AN - SCOPUS:0001515615
SN - 0009-2673
VL - 65
SP - 2748
EP - 2755
JO - Bulletin of the Chemical Society of Japan
JF - Bulletin of the Chemical Society of Japan
IS - 10
ER -