Conformationally Rigid Chelate Rings in Metal Complexes of Pyridyloxy-Substituted 2,2‘-Dioxybiphenyl-Cyclotetra- and Cyclotriphosphazene Platforms

2007 ◽  
Vol 46 (23) ◽  
pp. 9841-9852 ◽  
Author(s):  
Eric W. Ainscough ◽  
Andrew M. Brodie ◽  
Andreas Derwahl ◽  
Steve Kirk ◽  
Carl A. Otter
Keyword(s):  
Metal Complexes ◽  
Chelate Rings

Parallel stacking interactions in square-planar transition-metal complexes containing fused chelate and C6-aromatic rings

2012 ◽  
Vol 68 (3) ◽  
pp. 261-265 ◽  
Author(s):  
Dušan N. Sredojević ◽  
Dubravka Z. Vojislavljević ◽  
Zoran D. Tomić ◽  
Snežana D. Zarić
Keyword(s):  
Transition Metal ◽  
Metal Complexes ◽  
Transition Metal Complexes ◽  
Large Fraction ◽  
Stacking Interactions ◽  
Aromatic Rings ◽  
Metal Type ◽  
Square Planar ◽  
Planar Transition ◽  
Chelate Rings

Stacking interactions in the crystal structures of square-planar transition metal complexes from the Cambridge Structural Database with five- and six-membered chelate rings fused with C6-arom rings (arom = aromatic) were analyzed. The distribution of distances between the closest C6-arom–C6-arom and C6-arom–chelate contacts shows that in a large fraction of the intermolecular interactions the C6-arom ring of one molecule is closer to the chelate than to the C6-arom ring of the other molecule. These results indicate a possible preference of the C6-arom ring to form stacking contacts with the chelate rings. The preference is ubiquitous and does not depend on the metal type.

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