Bond lengths nitrile complexes

In a study of the hydrolysis of platinum(II)-nitrile complexes to afford the corresponding amides, the first well-characterized examples of platinum(II) complexes that dimerize spontaneously to form weakly bonded Pt-Pt dimers with an unsupported intermetallic bond have been described.166 For example, treatment of cw-[PtCl2(NCBut)2] with excess KOH affords the amide species cw-[PtCl2 HN=C(OH)But 2], which exists as a dimer (49) both in solution and in the solid state, with a Pt-Pt bond length of 3.165(1) A, as determined by X-ray crystallography. Four... 

Table 8. Stretching frequency i>cN and bond length Icn of some nitriles and of complexes thereof.

The eclipsed geometry of the eight coordination sites in quadruply bonded Mo2II,n complexes is shown in Figure 53 with the normal range of Mo—Mo bond lengths between 2.06 A and 2.17 A. Nitriles and cyano ligands have become more common as either neutral or... 

Whatever the cause for deviation of sequence distribution in SAN, there has been considerable interest in the development of polymerization methods to minimize the AN sequence length [6,7,58,68-75]. Many researchers [6,7,71-73,75,76] have shown that the addition erf Lewis acids to SAN copolymerization has a strong influence upon sequence distribution. Electron poor Lewis adds ormplex with the electron rich nitrile group of acrylonitrile. Complexation of the nitrile group increases its inductive effect resulting in a decrease of electron density of the acrylonitrile double bond (its Alfrey-Price e-value becomes more positive). Thus oopolymerization of the acrylonitrile ... 

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