Metal Alkenes, Alkynes, and Phenyls

The phenyl group when c-bonded to a metal exhibits bands characteristic of monosubstituted benzenes. The M—C Hs-type molecule exhibits 30 fundamentals, only six of which, shown in Fig. IV-1. are sensitive to the change in metals. Table lV-6 lists the observed frequencies of these six modes for typical 

As discussed in Sec. 111-19, terminal i (MX) bands appear in the following regions  

For a series with a fixed halogen, f (MX) is higher, as M is lighter in the same family of the periodic table. Thus the t (MCl) of the M(CH3)jCl series follow this order  

In general, the infrared intensity of (MX) decreases in the order p(MF) p(MCI) ( MBr) t (Ml), whereas the opposite order prevails for the Raman intensity. Table lV-7 lists i/(MC) and i (MX) of typical compounds.,  

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SPECTRA Ol- INORGANIC AND COORDINATION COMPOUNDS lV-2. METAL ALKENES. ALKYNES, AND PHENYLS... 

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