Cyano group infrared spectra

Cyanopentakis(benzyl isonitrile)iron(II) bromide, which represents a new class of iron isonitrile complexes, was investigated in some detail. This complex is diamagnetic and dissociates in nitrobenzene into two univalent-univalent ions as indicated by cryoscopic and conductivity measurements. It exhibits two peaks in the triple bond region of the infrared spectrum one at 2200 cm.—1 assigned to the isonitrile groups and another at 2092 cm.-1 assigned to the cyano group. The structure proof of cyanopentakis (benzyl isonitrile) iron (II) bromide is ... 

Various pyrazines (210, 211) and quinoxalines (32) react with copper(I) halides to give complexes of the general formula (CuX)2(biN). The infrared spectrum of (CuCN)2quinoxaline shows the cyano groups to be terminal, and it seems most likely that the complexes have the structure XCu(biN)CuX. Complexes of similar formula have been obtained by reducing CUCI2 with hypophosphorous acid or KI in the presence of azo-2-pyridine (10). However, it is believed that these contain trigonal copper and have the structure shown in Fig. 13. 

Infrared spectra were given for ricinine and for several compounds used in the study of the properties of the enzyme. In the spectrum for ricinine the typical C=N stretching band was present at about 2250 cm The cyano group of 3-cyano-2-pyridones was hydrolyzed if position 1 of the 2-pyridone was unsubstituted or substituted with a methyl or ethyl group and position 4 was unsubstituted or substituted with a methoxyl or ethoxyl group. 

Characterization of surface-functionalized dendritic macromolecules was achieved by the same methods and techniques as described previously. However, further information could be obtained from the H and 13C NMR, and in the cyano case, from the infrared spectra. By observation of the unique resonances for the functionality itself or the phenyl ring to which it is attached, the number of functional groups at the chain ends could be quantified. For example, the H NMR spectrum of 13 shows an ABq (7.46 and 7.61 ppm) at lower field to the resonance for the terminal phenyl rings (7.30-7.40 ppm). This unique and distinct set of resonances is due to a p-cyano-substituted phenyl ring. By comparing integration values, it was confirmed that only one of the exterior 48 phenyl rings carries a cyano substituent. Similar results were obtained for the brominated derivative 16. 

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