SYNTHESIS OF TECHNETIUM COMPLEXES WITH A P,N BIDENTATE PHOSPHINE AMINE LIGAND - CRYSTAL-STRUCTURE OF BIS[(O-AMIDO-PHENYL)DIPHENYLPHOSPHINE-KAPPA-N,P][(O-AMINOPHENYL)-DIPHENYLPHOSPHINE-KAPPA-N,P]TECHNETIUM(III) PERCHLORATE

被引:30
作者
REFOSCO, F [1 ]
BOLZATI, C [1 ]
MORESCO, A [1 ]
BANDOLI, G [1 ]
DOLMELLA, A [1 ]
MAZZI, U [1 ]
NICOLINI, M [1 ]
机构
[1] UNIV PADUA,DIPARTIMENTO SCI FARMACEUT,I-35131 PADUA,ITALY
来源
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS | 1991年 / 11期
关键词
D O I
10.1039/dt9910003043
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
The reactions of (o-aminophenyl)diphenylphosphine (HL) with ammonium pertechnetate have been investigated. The complexes [TcL3] 1 and [TcL2(HL)]+ 2, with [TcO4]-, [ClO4]- and [CF3CO2]- as counter anions, were isolated from the reaction mixture depending on the pH. The transformation of 1 into 2, and vice versa, was identified as an acid-base equilibrium by UV/VIS spectrophotometric measurements. The products have been characterized by means of the usual physicochemical determinations. Compound 2, as its perchlorate salt, has been studied by means of X-ray analysis. It exhibits a distorted-octahedral configuration in a monoclinic crystal system: space group P2(1)/n, a = 11.009(2), b = 19.361 (3), c = 24.473(3) angstrom, beta = 100.76(1)-degrees and Z = 4. The structure was solved by Patterson and Fourier methods and refined by least-squares methods to R = 0.052 using 5096 observed reflections. Relevant bond lengths and angles are: Tc-P(1) 2.483(2), Tc-P(2) 2.430(2), Tc-P(3) 2.436(2), Tc-N(1) 2.048(5), Tc-N(2) 1.948(5), Tc-N(3) 1.979(5) angstrom; P(2)-Tc-P(3) 160.2(1), P(1)-Tc-N(3) 164.3(2), N(1)-Tc-N(2) 163.6(2)-degrees.
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页码:3043 / 3048
页数:6
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