Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
SYNTHESIS OF MESO-PHENYL-4,6-DIPYRRINS, PREPARATION OF THEIR CU(II), NI(II), AND ZN(II) CHELATES, AND STRUCTURAL CHARACTERIZATION OF BIS[MESO-PHENYL-4,6-DIPYRRINATO]NI(II)
Autore:
BRUCKNER C; KARUNARATNE V; RETTIG SJ; DOLPHIN D;
Indirizzi:
UNIV BRITISH COLUMBIA,DEPT CHEM,2036 MAIN MALL VANCOUVER BC V6T 1Z1 CANADA UNIV BRITISH COLUMBIA,DEPT CHEM VANCOUVER BC V6T 1Z1 CANADA
Titolo Testata:
Canadian journal of chemistry
fascicolo: 11, volume: 74, anno: 1996,
pagine: 2182 - 2193
SICI:
0008-4042(1996)74:11<2182:SOMPOT>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
TRANSITION-METAL COMPLEXES; CRYSTAL-STRUCTURE; MOLECULAR STEREOCHEMISTRY; PYRROLE PIGMENTS; DIPYRROMETHENES; LIGANDS;
Keywords:
MESO-PHENYLDIPYRROMETHANES; MESO-PHENYLDIPYRRINS; MESO-PHENYLDIPYRRINATO TRANSITION METAL CHELATES; X-RAY CRYSTALLOGRAPHY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
58
Recensione:
Indirizzi per estratti:
Citazione:
C. Bruckner et al., "SYNTHESIS OF MESO-PHENYL-4,6-DIPYRRINS, PREPARATION OF THEIR CU(II), NI(II), AND ZN(II) CHELATES, AND STRUCTURAL CHARACTERIZATION OF BIS[MESO-PHENYL-4,6-DIPYRRINATO]NI(II)", Canadian journal of chemistry, 74(11), 1996, pp. 2182-2193

Abstract

meso-Phenyldipyrromethanes can be oxidized by 2,6-dicyano-3,5-dichloro-para-benzoquinone (DDQ) to the corresponding meso-phenyldipyrrins. As expected, these novel, stable bipyrrolic pigments readily form metalchelates with copper(II), nickel(II), and zinc(II). Their W-VIS spectra are compared with a series of blown alkyl-substituted dipyrrin chelates and, based oil the W-VIS spectral analysis, the dihedral angle between the two ligands iri the bis[meso-phenyldipyrrinato]Ni(II) complex was calculated to be 42 degrees. The molecular structure of this complex was determined by X-ray crystallography, essentially confirming the calculation. Crystals of C30H22N4Ni are orthorhombic, a = 17.156(3), b = 35.217(1), c = 7.886(1) Angstrom, Z = 8, space group Fddd. The structure was solved by direct methods and refined by hull-matrix least-squares procedures to R = 0.040 and R(W) = 0.031 for 1058 reflectionswith I greater than or equal to 3 sigma(F-2). The central nickel is coordinated in a distorted square-planar fashion by four nitrogens. Thepair of the planar dipyrrinato ligands enclose a dihedral angle of 38.5 degrees. This is the lowest angle reported For nickel(II) complexesof this kind. As a result of this, and in sharp contrast ro previously described nickel(II) dipyrrin chelates, the central metal is diamagnetic.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/08/20 alle ore 14:00:15