Ligands 7T -bonding

TRANSITION METAL COMPLEXES WITH 7T-BONDED LIGANDS... 

There is some controversy in the literature over how best to treat phase coupling [23-27]. Our procedure is to abandon the 3x3 AOM matrix for individual ligating atoms. This matrix represents interaction in a sigma (metal-ligand bond) direction, and two perpendicular n directions, and has the form M9 for an anisotropically 7t-bonding ligand. 

Some examples of organometallic compounds formed with 7t bonding ligands. 

Organic Synthesis using Transition Metal Complexes Containing 7T-Bonded Ligands... 

Asymmetric Synthesis by Homogeneous Catalysis Carbonylation Processes by Homogeneous Catalysis Coordination Organometalhc Chemistry Principles Electronic Stmcture of Clusters Hydride Complexes of the Transition Metals Hydrides Sohd State Transition Metal Complexes Organic Synthesis using Transition Metal Complexes Containing 7t-Bonded Ligands Oxidation... 

Silver ions form a number of complexes with both 7C-bonding and non-7t-bonding ligands. Linear polynuclear complexes are known. The usual species are AgL and AgL2, but silver complexes up to AgL have been identified. Many of these complexes have commercial application. 

On the other hand, rhodium(III) complexes containing 7T-bonded ligands are often pentacoordinate and undergo very rapid reductive elimination reactions. It is their ability to undergo this reaction that makes possible much of the important catalytic activity exhibited by lower oxidation state rhodium complexes. 

Other P=E transition metal 7t-bonded ligands are not as numerous, but several X-ray crystal structures are available. The three-coordinate ligand R2N(RN)PS forms the planar platinum(O) complex, (57), where the P=S bond shows bond lengthening on coordination. (The selenium analogue is shown in Section 14.5.3.2.)... 

Metal ion-directed stereoselective syntheses also often involve organometallic complexes. While, in terms of a molecular-mechanics description of the structures, there is no fundamental difference between metal-carbon and metal-heteroatom bonds, modeling 7t-bonded ligands is not trivial. Given a known reaction mechanism... 

ORGANOACTINIDE CHEMISTRY PROPERTIES OF COMPOUNDS HAVING METAL-CARBON BONDS ONLY TO 7t-BONDED LIGANDS... 

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