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Information × Registration Number 0308U008153, 0108U006728 , R & D reports Title Preparation and spectral study of biscarbene monomers of the 1,2,4-triazole series metal complexes on their basis popup.stage_title Одержання і спектральні дослідження біскарбенових мономерів ряду 1,2,4-триазолу та металічних комплексів на їх основі Head Korotkikh Nikolai Ivanovich, Доктор хімічних наук Registration Date 14-10-2008 Organization The L.M.Litvinenko Institute of Physical-Organic Chemistry and Coal Chemistry popup.description2 The goal of the work is the synthesis of heteroaromatic biscarbenes of the 1,2,4-triazole series, particularly, their 3,3'-bridged derivatives, study of their chemical and spectral properties, especially their reaction with copper (І) chloride. New conjugated biscarbene compounds of the 1,2,4-triazole series, particularly, 3,3'-bridged bis-1,2,4-triazol-5-ylidenes, are described for the first time. It was found three variants of synthesis of the indicated biscarbenes by the deprotonation of the respective bis-1,2,4-triazolium salts under the action of: а) potassium tert-butoxide in toluene, б) potassium hexamethylsilazanide in toluene, в) sodium hydride in acetonitrile. The synthesis of 3,3'-bridged 1,2,4-triazol-5-ylidenes was developed by the ring transformation of 2,2'-bridged 1,3,4-oxadiazoles with anilines. Spectral characteristics of biscarbenes and biscarbene complex of copper (I) chloride are studied, particularly, IR, 1Н and 13С NMR spectra. It was shown that the most characteristic 13С NMR resonanse for biscarbenes is their downfield signal in the region of 203-208 ppm, for complex of copper (I) chloride the carbene resonance is 31 ppm shifted upfield relative to the carbenic one. Product Description popup.authors popup.nrat_date 2020-04-02 Close