Results 301 to 310 of about 1,402,532 (353)

Transition Metal Carbide Complexes

Chemical Reviews, 2021
Carbide complexes remain a rare class of molecules. Their paucity does not reflect exceptional instability but is rather due to the generally narrow scope of synthetic procedures for constructing carbide complexes. The preparation of carbide complexes typically revolves around generating LnM-CEx fragments, followed by cleavage of the C-E bonds of the ...
Anders Reinholdt, Jesper Bendix
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Transition Metals

ChemInform, 2005
AbstractFor Abstract see ChemInform Abstract in Full Text.
Donald J. Darensbourg, Cesar G. Ortiz
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Metal-Insulator Transitions

Contemporary Physics, 1973
Abstract The valence and conduction bands in semi-conductors normally owe their properties to their crystal structures. Sometimes changes in pressure or composition in mixed crystals can lead to an overlap between these bands, which results in a transition to metallic behaviour.
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Molecular transition-metal phosphonates

Dalton Transactions, 2011
Molecular transition-metal phosphonates are of relatively recent origin and can be assembled by several synthetic strategies. The nuclearity and the structure of the metal aggregates can be modulated by several factors including the stoichiometry of the reactants, nature of the metal precursor and the type of phosphonic acid used.
Vadapalli, Chandrasekhar, Tapas, Senapati, Atanu, Dey, Sakiat, Hossain   +3 more
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Transition metals

2013
This chapter assesses the d-block elements, which form Groups 3–11 and are collectively often referred to as the transition metals. The common feature of these elements is the presence of a partially filled d sub-shell. It is the presence of this partly filled shell which is responsible for most of the special properties which set the transition metals
James Keeler, Peter Wothers
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Transition metal borylene complexes

Chemical Society Reviews, 2013
Borylene ligands (:BR) are isolobal to CO and other iconic organometallic ligands. As such, borylene ligands enjoy some parallels to these ligands, but in many ways, their chemistry is distinct. This tutorial review gives an introduction to the synthesis, properties and reactivity of the major classes of transition metal borylene complexes, including ...
Holger Braunschweig, Rian D. Dewhurst, Viktoria H. Gessner   +2 more
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Semiconductor-To-Metal Transitions in Transition-Metal Compounds

Physical Review, 1967
The theory presented in a previous paper is applied to the transition-metal compounds which are known to exhibit semiconductor-to-metal transitions. In particular, the predictions of the theory are compared with the experimental results of Feinleib and Paul on ${\mathrm{V}}_{2}$${\mathrm{O}}_{3}$.
David Adler, Julius Feinleib, Harvey Brooks, William Paul   +3 more
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Homonuclear transition-metal trimers

The Journal of Chemical Physics, 2005
Density-functional theory has been used to determine the ground-state geometries and electronic states for homonuclear transition-metal trimers constrained to equilateral triangle geometries. This represents the first application of consistent theoretical methods to all of the ten 3d block transition-metal trimers, from scandium to zinc.
Brian N, Papas, Henry F, Schaefer
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Electronic Transitions in Metals and Insulator-Metal Transitions

1973
In this chapter we take up transitions which change the electrical properties of metals or compounds by establishing a new ground state for the system. Changes in physical rather than chemical properties are involved in these transitions, in contrast to the events discussed in later chapters.
H. G. Drickamer, C. W. Frank
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The transition metal hexafluorides

Dalton Transactions, 2009
The nine transition metal hexafluorides present a unique series of closely related compounds. Deviations from octahedral structures are influenced by Jahn-Teller effects and spin orbit coupling. The most pronounced chemical behaviour is the increasing electron affinity in the direction WF(6)--> PtF(6) and MoF(6)--> RuF(6), so that with PtF(6) and RuF(6)
Matthias Johann, Molski, Konrad, Seppelt
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