ChemInform Abstract: TRANSITION METAL METHYLENE COMPLEXES, IV. NOVEL METHYLENE COBALT COMPLEXES

A hexaazatrinaphtylene-based transition metal complex that exhibits single molecule magnet behaviour is reported herein. This study reveals the influence of both nuclearity and topology on the magnetic properties of hexaazatrinaphtylene-based complexes.

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Transition metal complexes of substituted alkynes. II. Pentafluorophenylacetylene complexes of iron and cobalt

Australian Journal of Chemistry ◽

10.1071/ch9680097 ◽

1968 ◽

Vol 21 (1) ◽

pp. 97 ◽

Cited By ~ 11

Author(s):

RS Dickson ◽

DBW Yawney

Keyword(s):

Nuclear Magnetic Resonance ◽

Magnetic Resonance ◽

Transition Metal ◽

Metal Complexes ◽

Transition Metal Complexes ◽

Cobalt Complexes ◽

Spectroscopic Properties ◽

Stable Complex ◽

Structural Isomers ◽

Nuclear Magnetic Resonance Spectra

Treatment of pentacarbonyliron with pentafluorophenylacetylene has given the stable complex tricarbonyl-2,5-bis(pentafluorophenyl)cyclopentadienoneiron. There is no evidence of the formation of other structural isomers. The complex is also formed from pentafluorophenylaoetylene and nonacarbonyldiiron or dodecacarbonyltriiron. Two alkyne-cobalt complexes have been isolated from the interaction of octacarbonyldicobalt and pentafluorophenylacetylene. One of these is a bridging alkyne complex of molecular stoicheiometry Co2(CO)6(C6F6CCH); the second is a complex of formula Co3(CO)9(CCH2C6F5). The infrared and nuclear magnetic resonance spectra of the complexes are given, and the probable structures of the compounds are deduced from these spectroscopic properties.

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Transition-metal complexes of pyrrole pigments. 16. Cobalt complexes of 1,19-dimethyldehydrocorrins as vitamin B12 models

Journal of the American Chemical Society ◽

10.1021/ja00542a012 ◽

1980 ◽

Vol 102 (22) ◽

pp. 6736-6744 ◽

Cited By ~ 31

Author(s):

Yukito Murakami ◽

Yasuhiro Aoyama ◽

Koji Tokunaga

Keyword(s):

Transition Metal ◽

Vitamin B12 ◽

Metal Complexes ◽

Transition Metal Complexes ◽

Cobalt Complexes

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Transition metal complexes of substituted alkynes. VI. Substituent arrangement in some bridging tris(alkyne)-cobalt complexes

Australian Journal of Chemistry ◽

10.1071/ch9700475 ◽

1970 ◽

Vol 23 (3) ◽

pp. 475 ◽

Cited By ~ 7

Author(s):

RS Dickson ◽

PJ Fraser

Keyword(s):

Transition Metal ◽

Metal Complexes ◽

Transition Metal Complexes ◽

Cobalt Complexes

The new organocobalt complex CO2(CO)4(CF3C2CF3)2(CF3C2H) has been isolated from the reaction of hexafluorobut-2-yne with p-trifluoropropyne-hexacarbonyldicobalt. In addition, a second isomer of the known complex CO2(CO)4(CF3C2CF3)2(CF3C2H)2 has been isolated from the reaction of 3,3,3-tri-fluoropropyne with p-hexafluorobut-2-yne-hexacarbonyldicobalt. A detailed study of the 1H and 19F N.M.R. spectra of these and the related complexes Co2(C0)4- (CF3C2CF3)3 and CO2(CO)4(CF3C2H)3 has led to an assignment of the substituent arrangement in all of these complexes.

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Energetics of Reactions Involving Transition Metal Complexes: Calculation of Relative Electrode Potentials for Cobalt Complexes at Various Ionic Strengths Using Density Functional and Poisson−Boltzmann Methods

Journal of the American Chemical Society ◽

10.1021/ja9506723 ◽

1996 ◽

Vol 118 (43) ◽

pp. 10545-10550 ◽

Cited By ~ 3

Author(s):

Jian Hui Wu ◽

Christopher A. Reynolds

Keyword(s):

Transition Metal ◽

Metal Complexes ◽

Transition Metal Complexes ◽

Density Functional ◽

Cobalt Complexes ◽

Electrode Potentials ◽

Poisson Boltzmann

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Reactions of Sodium N,N-Diethyldithiocarbamate and Potassium Ethyl Xanthate with some 3d Transition Metal Halides in the presence of 2,2′-Bipyridyl and 1,10-Phenanthroline

Canadian Journal of Chemistry ◽

10.1139/v71-452 ◽

1971 ◽

Vol 49 (16) ◽

pp. 2726-2732 ◽

Cited By ~ 45

Author(s):

D. G. Holah ◽

C. N. Murphy

Keyword(s):

Transition Metal ◽

Methylene Chloride ◽

Cobalt Complexes ◽

Divalent Metal ◽

Metal Halides ◽

Iron Cobalt ◽

Nitrogen Bases ◽

Ethyl Xanthate ◽

Cobalt Nickel ◽

Nickel Copper

The synthesis and some properties of ethylxanthate (Xan−) complexes, MXan2 and MXan3− (M = manganese(II) and iron(II)) are reported. Reactions between divalent metal halides (manganese, iron, cobalt, nickel, copper, and zinc) and Xan− and between the metal halides and N,N-diethyldithiocarbamate (dtc−) in the presence of nitrogen bases 1,10-phenanthroline (phen) and 2,2′-bipyridyl (bipy) are described. The major products of these reactions are complexes of the type MXan2.Base and Mdtc2.Base (with notable exceptions). In the former series with bipy, two different crystalline modifications of the manganese, iron, and cobalt complexes are formed, and copper(II) is reduced to copper(I) by Xan− in the presence of both bases. In the nickel–dtc system with bipy, Nidtc2 is produced, while with phen, the complex [Niphen3]dtc2 is formed. The latter reacts very rapidly with methylene chloride. Cudtc2 is produced from the copper(II)/base/dtc reactions.

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