Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
LINKAGE ISOMERIZATION OF MSCN(CDOH)(2)(CDO)BME TO MNCS(CDOH)(2)(CDO)BME (M = TC, RE) - CRYSTAL-STRUCTURES OF TCNCS(CDOH)(2)(CDO)BME, RENCS(CDOH)(2)(CDO)BME, AND RESCN(CDOH)(2)(CDO)BME
Autore:
JURISSON S; HALIHAN MM; LYDON JD; BARNES CL; NOWOTNIK DP; NUNN AD;
Indirizzi:
UNIV MISSOURI,DEPT CHEM COLUMBIA MO 65211 BRISTOL MYERS SQUIBB CO,PHARMACEUT RES INST PRINCETON NJ 08543 BRACCO RES USA INC PRINCETON NJ 08543
Titolo Testata:
Inorganic chemistry
fascicolo: 8, volume: 37, anno: 1998,
pagine: 1922 - 1928
SICI:
0020-1669(1998)37:8<1922:LIOMTM>2.0.ZU;2-0
Fonte:
ISI
Lingua:
ENG
Soggetto:
ENCAPSULATION REACTIONS; TECHNETIUM COMPLEXES; DIOXIME COMPLEXES; THIOCYANATE; DIMETHYLGLYOXIME; SUBSTITUTION; RHENIUM; COBALT(III); IRON(II); NCS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
46
Recensione:
Indirizzi per estratti:
Citazione:
S. Jurisson et al., "LINKAGE ISOMERIZATION OF MSCN(CDOH)(2)(CDO)BME TO MNCS(CDOH)(2)(CDO)BME (M = TC, RE) - CRYSTAL-STRUCTURES OF TCNCS(CDOH)(2)(CDO)BME, RENCS(CDOH)(2)(CDO)BME, AND RESCN(CDOH)(2)(CDO)BME", Inorganic chemistry, 37(8), 1998, pp. 1922-1928

Abstract

The 7-coordinate technetium(III) and rhenium(III) monocapped tris(dioxime) complexes [MX(dioxime)(3)BR] have been prepared in which the seventh ligand, X, is thiocyanate or hydroxide (M = Tc, Re; R = Me, Et). Both the N- and S-bound thiocyanate linkage isomers are produced during the syntheses, however, the S-bound complex isomerizes to the N-bound analogue. The synthetic routes employed allowed isolation of sufficient quantities of the technetium and rhenium S-bound isomers to be identified; however, full characterization was not possible. The linkage isomerization reaction of TcSCN(CDOH)(2)(CDO)BMe to TcNCS(CDOH)(2)(CDO)BMe was monitored in dichloromethane by UV-visible spectrophotometry,with four isosbestic points observed, consistent with the formation of a single product. The N-bound isomers for both Tc and Re, and the S-bound isomer of Re were characterized by single-crystal X-ray diffraction analysis. The two N-bound complexes were found to be isostructural. TcNCS(CDOH)2(CDO)BMe crystallized in the orthorhombic space group P2(1)2(1)2(1) with a = 15.814(2) Angstrom b = 17.855(3) Angstrom, c = 17.997(5) Angstrom, Z = 8, R = 0.054, and R-W = 0.057. ReNCS(CDOH)(2)(CDO)BMe crystallized in the orthorhombic space group P2(1)2(1)2(1) with a = 15.795(1) Angstrom, b = 17.843(2) Angstrom, c = 18.014(3) Angstrom, Z = 8, R = 0.054, and R-W = 0.073. In both cases two independent molecules per unit cell were observed. ReSCN(CDOH)(2)(CDO)BMe crystallized in the monoclinic space group P2(i)/c with a = 10.0866(6) Angstrom, b = 26.301(2) Angstrom, c = 12.4592(7) Angstrom, beta = 100.5(1) deg, Z = 4, R = 0.100, and R-W = 0.141.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 30/03/20 alle ore 12:33:18