Group IV Organometallic Compounds

Carbon couplings with non-quadrupolar group IV metal nuclei collected in Table 4.75 [483-485] refer to 29Si, the heavier and more abundant tin isotope 119Sn, and to 207Pb. 

Gyromagnetic constants of 29Si and 119Sn are negative, in contrast to 207Pb. One-bond  

Two- and three-bond carbon-metal couplings follow patterns known from carbon-proton coupling Jem,random 3jmeia %r,hoi Table 4.75). Karplus-type 

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R. j. Ouellette, /. Am. Chem. Soc., 94, 7674 (1972). Conformational Analysis. XVIII. Force Field Calculations of Conformational Equilibria of Group IV Organometallic Compounds. 

Larrabee, R. B., Fluctional Main Group IV Organometallic Compounds, J. Organometal. Chem. 74 [1974] 313/64. 

Estes, A. S., Uden, P. C., Barnes, M. R., Plasma Emission Spectral Detection for High-Resolution Gas Chromatographic Study of Group IV Organometallic Compounds, J. Chromatog. 239 [1982] 181/9. 

Sakai, S., Itoh, K., Ishii, Y., Addition Reactions of the Group IV Organometallic Compounds and Their Synthetic Applications, Yuki Gosei Kagaku Kyokaishi 28 [1970] 1109/26. 

The study of Group IV organometallic nitrogen compounds is interesting from two points of view. First, the metal-nitrogen bond in many cases has a high reactivity. Second, the existence of pentacoordinated tin and lead was demonstrated first with certain types of nitrogen compounds. 

A. G. MacDiarmid, Organometallic Compounds of the Group IV Elements, Vol. 2, The Bond to Halogens and Halogenoids, Marcel Dekker, Inc., New York, 1972. 

Crompton, T. R., ed., "Chemical Analysis of Organometallic Compounds, Vol. 3 Elements of Group IV-B, Chapter 9. Academic Press, New York, 1974. 

Keto Derivatives of Group IV Organometalloids, 7, 95 Lewis Base-Metal Carbonyl Complexes, 3, 181 Ligand Substitution in Transition Metal ir-Complexes, 10, 347 Literature of Organo-Transition Metal Chemistry 1950-1970, 10, 273 Literature of Organo-Transition Metal Chemistry 1971,11, 447 Literature of Organo-Transition Metal Chemistry 1972, 12, 379 Mass Spectra of Metallocenes and Related Compounds, 8, 211 Mass Spectra of Organometallic Compounds, 6, 273... 

In general, organolead compounds are well-characterized substances that are quite stable at room temperature. However, they are thermally the least stable of the organometallic compounds of group IV. Most organolead compounds are liable to severe decomposition on heating to 100-200 °C, but they are not explosive111. 

Organometallic compounds, 14 550-551 25 71. See also Organometallics carbides contrasted, 4 648 as initiators, 14 256-257 iridium, 19 649-650 molybdenum(III), 17 27 osmium, 19 642-643 palladium, 19 652 platinum, 19 656-657 reaction with carbonyl groups, 10 505-506 rhodium, 19 645-646 ruthenium, 19 639 sodium in manufacture of, 22 777 titanium(IV), 25 105-120 Organometallic fullerene derivatives,... 

The catalyst component consists of halides of IV-VIII group elements having transition valence and the cocatalysts are organometallic compounds like alkyls, aryls and hydrides of group I-IV metals. Although there are hundreds of such catalyst cocatalyst systems listed in table below. Systems based on the organoaluminium compounds such as triethyl aluminium (AlEt3) or diethyl aluminium chloride... 

A further complication in the reduction of aryl Group IV derivatives is the formation of biphenyl radical anion (135, 100, 97, 20) or its derivatives (32). However, this reaction is not peculiar to organometallic radical anions but appears to be quite general for alkali metal reduction of phenylated compounds (135). 

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