Reactions of cationic transition metal acetonitrile complexes [M(CH3CN)n]m+ with GaCp*: novel gallium complexes of iron, cobalt, copper and silver

2009 ◽  
pp. 1372 ◽  
Author(s):  
Timo Bollermann ◽  
Arik Puls ◽  
Christian Gemel ◽  
Thomas Cadenbach ◽  
Roland A. Fischer
Keyword(s):  
Transition Metal ◽  
Iron Cobalt ◽  
Cobalt Copper ◽  
Gallium Complexes

scholarly journals Alkene Hydroamination via Earth‐Abundant Transition Metal (Iron, Cobalt, Copper and Zinc) Catalysis: A Mechanistic Overview

2020 ◽  
Vol 362 (8) ◽  
pp. 1550-1563 ◽  
Author(s):  
Pierre Colonna ◽  
Sophie Bezzenine ◽  
Richard Gil ◽  
Jérôme Hannedouche
Keyword(s):  
Transition Metal ◽  
Iron Cobalt ◽  
Copper And Zinc ◽  
Earth Abundant ◽  
Zinc Catalysis ◽  
Cobalt Copper

Synthesis of bis[bis(trimethylsilyl)amido]iron(II). Structure and bonding in M[N(SiMe3)2]2 (M = manganese, iron, cobalt): two-coordinate transition-metal amides

1988 ◽  
Vol 27 (10) ◽  
pp. 1782-1786 ◽  
Author(s):  
R. A. Andersen ◽  
Knut Faegri ◽  
Jennifer C. Green ◽  
Arne Haaland ◽  
M. F. Lappert ◽  
...  
Keyword(s):  
Transition Metal ◽  
Iron Cobalt ◽  
Metal Amides ◽  
Structure And Bonding

The apparent metallic valencies of transition metals in solid solution

1961 ◽  
Vol 261 (1305) ◽  
pp. 175-188 ◽  
Keyword(s):  
Transition Metal ◽  
Transition Metals ◽  
Conduction Band ◽  
Metal Content ◽  
Copper Alloys ◽  
Manganese Content ◽  
Axial Ratio ◽  
Lattice Contraction ◽  
Iron Cobalt ◽  
Cobalt And Nickel

According to previous work, solution of a third metal in the close-packed hexagonal ζ-phases which occur at approximately 1.5 electrons per atom in certain binary copper alloys causes the lattice spacings to vary in such a way that the axial ratio remains constant at a constant valency electron:atom ratio. On the assumption that this remains true when the third metal is a transition metal of the Vlllth Group of the Periodic Table, the lattice spacings of solutions of manganese, iron, cobalt and nickel in the copper-germanium ζ-phase have been examined. From the observed axial ratios, the contributions of the transition metals to the conduction band of the alloy have been assessed and expressed as an effective valency value. This value, at the lower electron:atom ratios (approximately 1.39), is unity for iron, cobalt and nickel, but decreases as the electron:atom ratio rises. For manganese effective valency values at the lower electron:atom ratios vary from 1.64 to 1.42 according to manganese content; again the values decrease with increasing electron:atom ratio. The dependence of the effective valency values on transition metal content is such that, if a lattice contraction is produced by the solution of the transition metal in the binary ζ-phase (cobalt, nickel) the valency decreases as the transition metal content rises. Lattice expansion (manganese) leads to the reverse effect, while the effective valency of iron, which has little effect on the lattice spacings, is virtually independent of iron content. The results are discussed in terms of transfer of electrons between the conduction band of the alloy and the virtual bound 3 d states localized on the transition metal atoms in solution.

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