摘要：

The preparations of compounds of the types Ni(en)2(NO3)2 and [Ni(Cn)2NO3]ClO4 (en = ethylenediamine) and analogs with other diamines and with some cyclic tetramines are described. The infrared spectra of the nitrate ion for the two types of compound can be distinguished from each other, and from ionic nitrate, and are taken to indicate monodentate and bidentate nitrato groups, respectively. For Ni(dien)( NO3)2 (dien = diethylenetriamine) nitrato groups of both types are present while for one of the cyclic tetraminenickel(II) dinitrates, bidentate and ionic nitrates are present. The reflectance spectra of the dinitrato compounds are indicative of trans structures, while those of the mononitrato compounds resemble those of the known cis compounds [Ni2(Cn)4Cl2]Cl2 and Ni(tren)(NCS)2 (t.en = 2,2′,2″-triaminotriethylamine). The magnetic susceptibilities, all μeff 3.1 B.M., are reported.

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