Polymerization in the C2H2 Plasma

The product analysis in MW C2H2 discharge by Li ion attachment MS [48], has also brought forth a detection in the formation of many imfamiliar HC neutral 

Studies have clearly shown that the occurrence of the polymerization processes takes place. The identified polymer radicals and stable molecules include C Hj (n is up to 4), C Hj (up to 6), (up to 4), C Hg (up to 4) and (up to 8), 

Nitriles Many products were formulated as CH jCN ( =l-5), C H2, CN ( = 5), C H, 3CN ( = 7), C H, 3CN ( = 3), CH, .,CN n = 5), CH, , CN ( =3), and C H2 jjCN (n=3). As can be assumed from previous experimental results [98], which showed that that the dominant products from MW discharge in a CH4/N2 mixture were nitriles, these homologues (corresponding to additions of CH2 units) may be saturated or unsaturated nitriles. Their abundance seems to vaiy smoothly with chain length, with CH3CN being most abundant. 

Among many the nitriles produced, the cyanopolyynes, HC N, are particularly interesting due to their linear conjugated structures, their biological importance, and their abundance in the interstellar medium. The well-known interstellar cyanopolyynes HC N ( = 1,3,5,7) [142] can be formed abundantly in the present system HCN (relative intensity, 43), HCCCN (51), HCCCCCN (46), and HCCCCCCCN (19). In this study, the even numbers of the HC N series (with n at 2,4, and 6) were also detected however, their relative intensities were much less than those of the cyanopolyynes with odd carbon numbers. 

Hydrazine in a fast-flow system was srrbjected to a MW discharge near the sampling orifiee of an ion attachment rrrass spectrometer. A variety of products are 

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