Carbon C-bonding

Table II. Half-wave and Peak Potentials for Metal-Carbon c-bonded Germanium and...

The triphenylphosphine complex 42 b reacts with bromine to give a platinum(IV) species 42f, assigned the cyclic structure with four platinum-carbon c-bonds. The reaction sequence here must begin with the attack of a bromine molecule on an uncoordinated olefin, as otherwise it is hard to see why two metal-carbon bonds are formed, and not one metal-carbon and one metal-bromine. 

Fig. 2-6 Reduction of both cis- and trans-butadiene to their equivalent graph which illustrates the carbon-carbon c-bond connectivity of borh forms of butadiene.

This chapter focuses on [2,3] sigmatropic reactions which result in the formation of a new carbon-carbon tr-bond for examples of [2,3] rearrangements which result in the formation of heteroatom-bearing stereogenic centers see Sections D.4.11 and D.7.6. For the purpose of this discussion, [2,3] rearrangements which result in carbon-carbon c-bond formation arc divided into two major subgroups ... 

As a technique for carbon-carbon c-bond formation, the [2,3] Wittig rearrangement of allylic ethers 1 offers many of the stereochemical features of the [3,3] Claisen rearrangement of allyl vinyl ethers (see Section D.1.6.3.1). 

Transition metal complexes with metal-carbon c-bonds are key intermediates in many important industrial processes, in biochemical reactions, organic synthesis, and processes involving aliphatic radicals. Of special interest are those complexes, which are short-lived intermediates in catalytic processes. However due to the high reactivity of the latter complexes, the study of their properties is difficult as their steady state concentration is in most cases far below the detection limit. 

I 5 Metallopolymers with Metal-Carbon c-Bonds in the Main Chain... 

FIGURE 21.63 Participation of the carbon-carbon C bond to give a symmetrical delocahzed ion. Notice that three different kinds of carbons exist. The NMR spectram will consist of three lines. 

Metal-Carbon c -Bonds involving Group VIII Metals... 

---