CH2=CHCN

The reduction of acrylonitrile, CH2=CHCN, to adiponitrile, NC(CH2)4CN, is an important industrial process. A 0.594-g sample of acrylonitrile is placed in a 1 -L volumetric flask and diluted to volume. An exhaustive controlled-potential electrolysis of a 1.00-mL portion of the diluted acrylonitrile requires 1.080 C of charge. What is the value of n for this reduction ... 

Nitrile Rubber (NBR). This is the most solvent-resistant of the synthetic elastomers, except for Thiokol, which, however, has rather severe limitations. NBR was developed both in Germany and the United States by private industry prior to World War II. It is a copolymer of butadiene, CH2=CH—CH=CH2, and acrylonitrile, CH2=CHCN, corresponding to the molecular stmcture shown in Table 1. 

CH2=CHCN, CH2=CHCOMe, CKj CHCOjEt, CH2=CMeC02Me, Et02CN=NC02Et, PhCH=CHN02, PhCCl=CHN02. PhCH=CH2, PhCH=CHPh... 

Cheoiical Designations - Synonyms Cyanoethyiene, Fumigrain, Ventox, Vinyi Cyanide Chemical Formula CH2=CHCN. 

CH2=CHCN -I-CH2=CHSi(CH3)3 C6H5CH2CH2CHBrCN, CjH5CH2CH2CHBrSi(CH3)3 C6H5CH2CH2CH(CN)CH2CHBrSi(CH3)3 27... 

Acrylonitrile Is produced from propene, ammonia, and oxygen by the following balanced equation (see Example 14-5) 2 C3 Hg + 2 NH3 + 3 O2 2 CH2 CHCN -1- 6 H2 O Relate the rates of reaction of starting materials and products. 

The balanced equation shows that three molecules of oxygen are consumed for every two molecules of propene and two molecules of ammonia. Thus, the rate of C3 Hg and NH3 consumption is only two-thirds the rate of O2 consumption. Those seven molecules of starting materials produce two molecules of CH2 CHCN and six molecules of H2 O. Thus, CH2 CHCN is produced at the same rate as C3 Hg is consumed, whereas H2 O is produced three times as fast as CH2 CHCN is. The link between relative reaction rates and reaction stoichiometry is Equation. Therefore,... 

---