ISSN:
1572-9001
Keywords:
Ni(II) chelates ofΒ-diones and nitrogenous bases
;
Ni(II) chelates ofΒ-diones andα-diimines
;
cationic mixed-ligand nickel(II) chelates
;
structure of mixed-ligand nickel(II) chelates
;
spectra of mixed-ligand nickel(II) chelates
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract The infrared and electronic excitation spectra of a series of new nickel(II) chelates containing anα-diimine (or nitrogenous base, enR) and the anion of aΒ-dione (1,3-ketoenol or 1,3-ketoester,ΒH) were obtained in the solid state and in solution. The composition and the overall structure of the new chelates in the solid state depends on ligand concentration, the substituents within theΒ-dionato moiety and the counterion present. The IR and electronic excitation spectra of [Ni(enR)2 Β]NO3 and [Ni(enR)Β(O2NO)] indicate, in conjunction with other physicochemical measurements, bidentate coordination of the ligands, while the spectral shifts reveal replacement of the (O,O′)nitrato group by basic solvents. The existence of the nickel(II) in an octahedral environment is confirmed by an X-ray structure analysis of [Ni(dpamH)2acac]NO3 · CH3OH (monoclinic, space groupP2l/n, a=17.296(1),b=7.462(1),c=21.604(3) å,Β=95.65(1)
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02262848
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