Crystal and molecular structure, spectroscopic properties, and redox behavior of [.eta.5-C5H5CoCO]2.-, a "mixed-valence" organometallic radical anion having a high degree of intramolecular delocalization and cobalt in formal oxidation state +0.5

1976 ◽  
Vol 98 (1) ◽  
pp. 256-258 ◽  
Author(s):  
Neil E. Schore ◽  
Casmir S. Ilenda ◽  
Robert G. Bergman
Keyword(s):  
Molecular Structure ◽  
Oxidation State ◽  
Radical Anion ◽  
Crystal And Molecular Structure ◽  
Mixed Valence ◽  
Spectroscopic Properties ◽  
Redox Behavior ◽  
Formal Oxidation State ◽  
High Degree

Crystal and Molecular Structure of Tris(Ethane-1,2-Diamine)Osmium(III) Trifluoromethanesulfonate Monohydrate

1987 ◽  
Vol 40 (7) ◽  
pp. 1267 ◽  
Author(s):  
PA Lay ◽  
GM Mclaughlin ◽  
AM Sargeson
Keyword(s):  
Molecular Structure ◽  
Bond Length ◽  
Oxidation State ◽  
Bond Order ◽  
Crystal And Molecular Structure ◽  
Single Bond ◽  
Bond Lengths ◽  
Formal Oxidation State ◽  
Bite Angle ◽  
Diamine Ligands

The crystal and molecular structure of racemic [Os(en)3] (CF3SO3)3.H2O has been determined. The [Os(en)3]3+ ion adopts a le ξob configuration and has approximate C2 symmetry with an Os-N(av.) bond length of 2.11 � and a bite angle for the chelate of - 82�. The previously recorded structure of the [Os(en-H)2(en)]2+ ion in which two deprotonated ethane-1,2-diamine ligands adoptoa cis configuration of the two amido donors, and in which the OsIV -N( amido ) bonds (1.90 �) are much shorter than the Os-N(amine) bonds, 2.11 ( cis ), 2.19 (trans), along with the present structure indicates a bond order > 1 for the osmiumo amido bond. The normal Os-N bond lengths fall into well defined ranges OS-NR3 (2.11-2.14 �), Os=NR2- (~1.90 �),Os=NR2 (- 1.70 �) and Os=N3-(- 1.58-1.63 �). These single bond lengths are more affected by trans effects than the formal oxidation state of the osmium centre.

The chemistry of sterically crowded aryl oxide ligands. 3. Crystal and molecular structure and spectroscopic properties of mixed benzyl-aryl oxide compounds of zirconium

1985 ◽  
Vol 4 (5) ◽  
pp. 902-908 ◽  
Author(s):  
Stanley L. Latesky ◽  
Anne K. McMullen ◽  
Gerald P. Niccolai ◽  
Ian P. Rothwell ◽  
John C. Huffman
Keyword(s):  
Molecular Structure ◽  
Crystal And Molecular Structure ◽  
Spectroscopic Properties
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