Bis-Phenylhydrazine

The vNiN vibrations were assigned in 2,6-diacetylpyridine dioxime at 416, 341 and 276 cm and at 370 and 265 cm in hexaamine complexes, at 410 and 334 cm in triethylendiamine derivatives, around 240 cm" in pyridine derivatives and in imidazol complexes between 325 and 210cm"Gobemado-Mitre et al attributed the vCuN mode in copper complex of naphthalocya-nine to those bands observed at 341 and 221 cm" In Cu(II) tri-azamacrocycles it has been proposed the bands at 383 and 314 cm" as due to vCuN. This mode was observed in copper complexes of cyclam at 437 cm" and in Cu(II) hexaazacyclophane at 390 and 280 cm" In phenantroline Cu(II) complexes the vCuN vibration was identified with the bands at 300 and 430 cm" In the case of the Zn complexes, some tetraamine derivatives display the vZnN band at 432cm" and in triethylendiamine complexes were observed at 405 and 291 cm" in imidazole complexes the vZnN mode was assigned to the bands between 325 and 210 cm" The vZnN mode of bis(phenylhydrazine)-l, 10-phenantroline Zn(II) was attributed to the bands at 376 and 267cm" ... 

The most relevant infrared spectral features due to the metal complexation of the bis(phenylhydrazine)-l,10-phenanthroline ligand (PHP), Figure 14.14, occur in the 450-100 cm region In this region have been reported most of the coordination ring vibrations directly related to the metal. 

Figure 14.23. Molecular model for the NCA of Cu(II) bis(phenylhydrazine)- , 10-phenanthroline. Reprinted by permission of Elsevier B.V.

Table 14.4. Diagonal (F) and interaction (/) force constants (mdyn/A), for Cu(II) bis(phenylhydrazine)-l,10-phenanthroline complex.

A surface vibrational study of bis(phenylhydrazine)-l,10-phenanthroline (PHP) macrocycle complexes has been intended PHP macrocycles display a non-planar and asymmetric coordination site. No surface effect study is possible to perform on the ligand because it is easily decomposed by solvent dilution. 

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