Group IVB hydrides

Reactions of amido-group IVB element (Si, Ge, Sn) bonds with group IVB hydrides result in bond cleavage and N—H bond formation ", e.g. ... 

Group IVB hydrides react with alkynes and alkenes under thermal, photolytic, radical-initiated and catalyzed (homogeneous or heterogeneous) conditions e.g. ... 

Group IVB hydride compounds show varied reactivity with CP2V as a function of the group IVB element ... 

Table 1. Reactions of Some Group IVB Hydrides with Alkynes ...

No simple reactions between CO2 or CS2 and group IVB hydrides have been reported. On the other hand, a vast literature exists on insertion of CO2 and CS2 into N-H bonds. The reactions of NH3 with CO2 and CS2, to form ammonium carbamate and dithiocarbamate, respectively, are of commercial importance in the synthesis of urea, cyanates, and thiocyanates but are properly considered in the realm of organic chemistry. Secondary phosphines react with CS2 in the presence of a base ... 

Autoxidation of other group IVB hydrides proceeds by a meehanism similar to that of carbon, but hydroperoxide products are not usually observed. For boron, (CH3)2B00H is produced as a short-lived intermediate in the autoxidation of (CH3)2BH2BH2 ... 

Lead hydride is the least well characterized of the Group IVB hydrides. It is formed along with hydrogen, on the electrolysis of dilute sulphuric add with lead electrodes, and by the dissolution of lead-magnesium alloy in dilute add. The hydride of lead formed in small quantities is assumed to be PbH4 (b.p.--13°C)m. 

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