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Titolo:
Synthesis of a mixed cluster/binuclear compound. Electrochemical properties and X-ray diffraction structure of CO3(CO)(9)[mu(3)-CCO2CH2CCH{Co-2(CO)(6)}]
Autore:
Castellani, MP; Bott, SG; Richmond, MG;
Indirizzi:
Univ N Texas, Dept Chem, Denton, TX 76203 USA Univ N Texas Denton TX USA 76203 N Texas, Dept Chem, Denton, TX 76203 USA Marshall Univ, Dept Chem, Huntington, WV 25755 USA Marshall Univ Huntington WV USA 25755 Dept Chem, Huntington, WV 25755 USA Univ Houston, Dept Chem, Houston, TX 77204 USA Univ Houston Houston TX USA 77204 uston, Dept Chem, Houston, TX 77204 USA
Titolo Testata:
JOURNAL OF CHEMICAL CRYSTALLOGRAPHY
fascicolo: 9, volume: 28, anno: 1998,
pagine: 693 - 699
SICI:
1074-1542(199809)28:9<693:SOAMCC>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
PARAMAGNETIC ORGANOMETALLIC MOLECULES; TRICOBALT CARBON CLUSTER; ELECTRON-TRANSFER; REDOX CHEMISTRY; RADICAL-ANIONS; POLYDENTATE LIGANDS; MULTICLUSTER ARRAYS; CRYSTAL-STRUCTURES; CAPPED CLUSTER; COMPLEXES;
Keywords:
tetrahedrane; pentacobalt; pendant alkyne;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
46
Recensione:
Indirizzi per estratti:
Indirizzo: Richmond, MG Univ N Texas, Dept Chem, Denton, TX 76203 USA Univ N Texas Denton TX USA 76203 Chem, Denton, TX 76203 USA
Citazione:
M.P. Castellani et al., "Synthesis of a mixed cluster/binuclear compound. Electrochemical properties and X-ray diffraction structure of CO3(CO)(9)[mu(3)-CCO2CH2CCH{Co-2(CO)(6)}]", J CHEM CRYS, 28(9), 1998, pp. 693-699

Abstract

The tetrahedrane cluster Co-3(CO)(9)(mu(3)-CCO2CH2C=CH) reacts with Co-2(CO)(6) to furnish the pentacobalt compound Co-3(CO)(9)[mu(3)-CCO2CH2CCH{Co-2(CO)(6)}] in high yield. Functionalization of the pendant alkyne group by Co2(CO)6 was ascertained by IR and NMR spectroscopies (H-1 and C-13), and the solid-state structure of Co-3(CO)(9)[mu(3)-CCO2CH2CCH{Co-2(CO)(6)}] was unequivocally established by X-ray diffraction analysis. Co-3(CO)(9)[mu(3)-CCO2CH2CCH {Co-2(CO)(6)}] crystallizes in the triclinic space group <P(1)over bar>, a = 7.9674(5), b = 13.208(1), c = 13.3094(9) Angstrom, alpha = 76.257(6), beta = 79.123(6), gamma = 86.403(6)degrees, V = 1335.8(2) Angstrom(3), Z = 2, and d(calc) = 2.016 g/cm(3). The electrochemical properties of Co-3(CO)(9)[mu(3)-CCO2CH2CCH {Co-2(CO)(6)}] were examined by cyclic voltammetry and the first reduction wave was found to be a reversible, one-electron reduction associated with the tricobalt moiety. No evidence for electronic communication between the Co-3 and Co-2 portions of the complex was observed. The results of extended Huckel MO calculations on Co-3(CO)(9)[mu(3)-CCO2CH2CCH{Co-2(CO)(6)}] establish the nature of the LUMO in Co-3(CO)(9)[mu(3)-CCO2CH2CCH{Co-2(CO)(6)}].

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Documento generato il 28/11/20 alle ore 01:02:54