The tungsten-tungsten triple bond. 14. Factors influencing triple bonds between tungsten atoms having valence molecular orbital configurations of .sigma.2.pi.4 and .pi.4.delta.2 and preparation and characterization of bis(neopentyl)bis(acetato)bis(diethyldithiocarbamato)ditungsten

1987 ◽  
Vol 109 (22) ◽  
pp. 6817-6825 ◽  
Author(s):  
Malcolm H. Chisholm ◽  
David L. Clark ◽  
John C. Huffman ◽  
William G. Van der Sluys
Keyword(s):  
Molecular Orbital ◽  
Triple Bond ◽  
Triple Bonds ◽  
Factors Influencing ◽  
Valence Molecular Orbital

The tungsten-tungsten triple bond. 13. Bisalkyl tetracarboxylates of dimolybdenum and ditungsten. Triple bonds between metal atoms with the valence molecular orbital description .pi.4.delta.2

1987 ◽  
Vol 109 (22) ◽  
pp. 6796-6816 ◽  
Author(s):  
Malcolm H. Chisholm ◽  
David L. Clark ◽  
John C. Huffman ◽  
William G. Van der Sluys ◽  
Edward M. Kober ◽  
...  
Keyword(s):  
Molecular Orbital ◽  
Triple Bond ◽  
Triple Bonds ◽  
Metal Atoms ◽  
Valence Molecular Orbital

Molecular orbital and spectroscopic studies of triple bonds between transition-metal atoms. 2. The d5-d5 Re2Cl4(PR3)4 compounds

1983 ◽  
Vol 105 (9) ◽  
pp. 2606-2611 ◽  
Author(s):  
Bruce E. Bursten ◽  
F. Albert Cotton ◽  
Phillip E. Fanwick ◽  
George G. Stanley ◽  
Richard A. Walton
Keyword(s):  
Transition Metal ◽  
Molecular Orbital ◽  
Spectroscopic Studies ◽  
Triple Bonds ◽  
Metal Atoms ◽  
Transition Metal Atoms

Darstellung, Reaktionen und spektroskopische Charakterisierung von [Os2X8]2-, X = Cl, Br, I, und Kristallstruktur von (PPN)2[Os2I8] · 2 CH2Cl2 / Preparation, Reactions and Spectroscopic Characterization of [Os2X8]2-, X = Cl, Br, I, and Crystal Structure of (PPN)2[Os2I8] · 2 CH2Cl2

1990 ◽  
Vol 45 (10) ◽  
pp. 1416-1424 ◽  
Author(s):  
W. Preetz ◽  
P. Hollmann ◽  
G. Thiele ◽  
H. Hillebrecht
Keyword(s):  
Crystal Structure ◽  
Structure Determination ◽  
Triple Bond ◽  
Room Temperature ◽  
Spectroscopic Characterization ◽  
Spectroscopic Constants ◽  
Monoclinic System ◽  
X Ray ◽  
Fine Structures

The triply bonded octahalogenodiosmate(III) anions [Os2X8]2-, previously known with X = Cl, Br, have now been extended to include the iodide with two staggered OsI4 units. This compound was prepared by treating [Os2Cl8]2- with Nal at room temperature in acetone solution. The structure determination by X-ray diffractometry on single crystals of (PPN)2[Os2I8] · 2 CH2Cl2, reveals crystallization in the monoclinic system, space group P21/c with Z = 4. The Os-Os triple bond is with 2.212(1) Å the longest within the three octahalogenodiosmates(III). The Raman spectra show ν(OsOs) at 285, [Os2Cl8]2-; at 287, [Os2Br8]2- and for the iodo compound at 270.1 cm-1 with up to three overtones. The spectroscopic constants are calculated to be ω1 = 270.9 cm-1; X11 = -0.50 cm-1. The 10 Κ UV-VIS spectra of solid [(n-C4H9)4N]2[Os2X8] exhibit δ-π* transitions with maxima at 723, 690 and 643 nm, superimposed by vibrational fine structures with long progressions of 195, 211 and 183 cm-1 for X = Cl, Br, I, respectively. Oxidation of [Os2X8]2-, X = Cl, Br with the corresponding halogen leads to the cleavage of the Os-Os bond, and the dekahalogenodiosmates(IV), [Os2X10]2-, are formed

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