Bond compounds containing

Note that these compounds are covalently bonded compounds containing only hydrogen and carbon. The differences in their strucmral formulas are apparent the alkanes have only single bonds in their structural formulas, while the alkenes have one (and only one) double bond in their structural formulas. There are different numbers of hydrogen atoms in the two analogous series. This difference is due to the octet rule that carbon must satisfy. Since one pair of carbon atoms shares a double bond, this fact reduces the number of electrons the carbons need (collectively) by two, so there are two fewer hydrogen atoms in the alkene than in the corresponding alkane. 

The structures of doubly bonded compounds containing tin readily lend themselves to study by multinuclear NMR spectroscopy, as tin has two NMR active isotopes ll7Sn and ll9Sn. The chemical shifts of doubly bonded tin species in the 119Sn NMR spectrum cover a broad range from 6 = -150 to +835 (Table VI) however, the majority of the signals occur at low field S = 400 or above. 

Double-bond compounds containing heavier main group elements are highly reactive to undergo ready addition reactions with various reagents. 

Note that these compounds are covalently bonded compounds containing only hydrogen and carbon. The differences in their structural formulas are apparent the alkanes have only single bonds in their structural formulas, while the alkenes have one (and only one) double bond in their... 

It is difficult to draw sharp boundaries between compounds containing simple Au—M bonds, compounds containing a gold atom bound to two or more transition elements, and compounds containing two or more gold atoms and one or more transition metal atoms. Thus compounds with gold-transition metal bonds may be found in Sections 55.21.2, 55.21.3 and in the following sections. 

Conjugated double-bond compounds containing germanium. 869... 

ReCl3 is a metal-metal bonded compound containing Re triangles... 

While N=N bonds abound, until recently other Group 15 E=E bonds were unknown. Today, however, there are stable compounds that contain P=P, P=As, P=Sb, As=As, and Bi=Bi72 bonds. Compounds containing Sb=Sb bonds are so far known only as ligands (10-XLVII). The best calculations show that the n bond strengths of HN=NH and HP=PH are 256 and 150 kJ mol-1, respectively. Thus, while much weaker than the N—N n bond, the P—P n bond has considerable strength. 

The ability to react with dienes is not restricted to the ethylenic double bond. Compounds containing a hetero atom as part of the reactive group, whether of the diene or of the philodiene, cyclize to yield heterocycles.40... 

Various metal-metal bonded compounds containing relatively electronegative metals, such as Si, Ge, Sn, B, Al, and Zn, can undergo Pd-catalyzed metallometallation, which mostly involves yn-addition to alkynes. One plausible mechanistic scheme involves (i) oxidative addition of metal-metal bonded compounds to Pd, (ii) metallopalladation (pattern 6) leading to yn-addition of metal-Pd bonds, and (iii) reductive elimination (Scheme 12). As such, the overall mechanism resembles that of Pd-catalyzed hydrogenation or hydrosilation, and the critical metallopalladation step must be mechanistically closely related to those of hydropalladation and carbopalladation. These reactions are discussed in detail in Sect. Vn.5. 

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