ChemInform Abstract: Terminal Ligand Assignments Based on Trends in Metal-Ligand Bond Lengths of Cubane-Type [Fe4S4]2+,+ Clusters.

ChemInform ◽  
2010 ◽  
Vol 29 (38) ◽  
pp. no-no
Author(s):  
B. M. SEGAL ◽  
H. R. HOVEYDA ◽  
R. H. HOLM
Keyword(s):  
Terminal Ligand ◽  
Bond Lengths ◽  
Metal Ligand ◽  
Ligand Bond

Terminal Ligand Assignments Based on Trends in Metal−Ligand Bond Lengths of Cubane-Type [Fe4S4]2+,+Clusters

1998 ◽  
Vol 37 (13) ◽  
pp. 3440-3443 ◽  
Author(s):  
B. M. Segal ◽  
H. R. Hoveyda ◽  
R. H. Holm
Keyword(s):  
Terminal Ligand ◽  
Bond Lengths ◽  
Metal Ligand ◽  
Ligand Bond

The Crystal and Molecular Structures of Two Modifications of cis-Dichloro-mer-tris-(dimethylphenylphosphine)hydridoiridium(III)

1988 ◽  
Vol 41 (3) ◽  
pp. 283 ◽  
Author(s):  
GB Robertson ◽  
PA Tucker
Keyword(s):  
Heavy Atom ◽  
Molecular Structures ◽  
Monoclinic Space Group ◽  
X Ray Diffraction ◽  
Orthorhombic Space Group ◽  
Space Group ◽  
X Ray ◽  
Bond Lengths ◽  
Metal Ligand ◽  
Ligand Bond

The structures of two crystalline modifications of mer -(Pme2Ph)3H-cis-Cl2IrIII, (1), have been determined from single-crystal X-ray diffraction data. Modification (A) is monoclinic, space group P21/c with a 12.635(1), b 30.605(3), c 14.992(2)Ǻ, β 110.01(2)° and Z = 8. Modification (B) is orthorhombic, space group Pbca with a 27.646(3), b 11.366(1), c 17.252(2)Ǻ and Z = 8. The structures were solved by conventional heavy atom techniques and refined by full-matrix least- squares analyses to conventional R values of 0.037 [(A), 8845 independent reflections] and 0.028 [(B), 5291 independent reflections]. Important bond lengths [Ǻ] are Ir -P(trans to Cl ) 2.249(1) av. (A) and 2.234(1) (B), Ir -P(trans to PMe2Ph) 2.339(2) av. (A) and 2.344(1), 2.352(1) (B), Ir-Cl (trans to H) 2.492(2), 2.518(2) (A) and 2.503(1) (B) and Ir-Cl (trans to PMe2Ph)2.452(2) av. (A) and 2.449(1)(B). Differences in chemically equivalent metal- ligand bond lengths emphasize the importance of non-bonded contacts in determining those lengths.

scholarly journals Metal Complex Geometries in Small-Molecule Crystals

1998 ◽  
Vol 54 (6) ◽  
pp. 1194-1198 ◽  
Author(s):  
A. Guy Orpen
Keyword(s):  
Crystal Structure ◽  
Hydrogen Bonding ◽  
Metal Complex ◽  
Small Molecule ◽  
Structure Determination ◽  
Complex Geometries ◽  
Bond Lengths ◽  
Structural Database ◽  
Metal Ligand ◽  
Ligand Bond

The origins, scope and utility of compilations of metal–ligand and intraligand bond lengths based on the Cambridge Structural Database are discussed. The limitations on the apparent uncertainty of metal–ligand bond lengths derived from crystallographic data and recent evidence of metal-assisted hydrogen bonding involving ligands are reviewed in the light of the transferability of bond-length values from one crystal structure determination.

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