Vibrational spectra, powder X-ray diffractions and physical properties of cyanide complexes with 1-ethylimidazole.
The heteronuclear tetracyanonickelate(II) complexes of the type [M(etim)Ni(CN)4]n (hereafter, abbreviated as M-Ni-etim, M=Mn(II), Fe(II) or Co(II); etim=1-ethylimidazole, C5H8N2) were prepared in powder form and characterized by FT-IR and Raman spectroscopy, powder X-ray diffraction (PXRD), thermal (TG; DTG and DTA), and elemental analysis techniques. The structures of these complexes were elucidated using vibrational spectra and powder X-ray diffraction patterns with the peak assignment to provide a better understanding of the structures. It is shown that the spectra are consistent with a proposed crystal structure for these compounds derived from powder X-ray diffraction measurements. Vibrational spectra of the complexes were presented and discussed with respect to the internal modes of both the etim and the cyanide ligands. The C, H and N analyses were carried out for all the complexes. Thermal behaviors of these complexes were followed using TG, DTG and DTA curves in the temperature range 30-700 °C in the static air atmosphere. The FT-IR, Raman spectra, thermal and powder X-ray analyses revealed no significant differences between the single crystal and powder forms. Additionally, electrical and magnetic properties of the complexes were investigated. The FT-IR and Raman spectroscopy, PXRD, thermal and elemental analyses results propose that these complexes are similar in structure to the Hofmann-type complexes.
Eskişehir Osmangazi University, Faculty of Arts and Sciences, Department of Physics, TR-26480 Eskişehir, Turkey. Electronic address: gkurkcuo@ogu.edu.tr.
Güneş Süheyla
GS
Kürkçüoğlu
Ataşehir Adıgüzel Vocational School, Department of Optician, TR-34779 İstanbul, Turkey.
Fulya Çetinkaya
FÇ
Kiraz
Eskişehir Osmangazi University, Graduate School of Natural and Applied Sciences, Physics, TR-26480 Eskişehir, Turkey.
Elvan
E
Sayın
1-Ethylimidazole complex; Cyanide-bridged complex; FT-IR and Raman spectra; Heteronuclear complex; Powder XRD; Tetracyanonickelate(II) complex