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Cover Feature: Gallium “Shears” for C=N and C=O Bonds of Isocyanates (Chem. Eur. J. 35/2019)
Author(s) -
Dodonov Vladimir A.,
Chen Weixing,
Zhao Yanxia,
Skatova Alexandra A.,
Roesky Peter W.,
Wu Biao,
Yang XiaoJuan,
Fedushkin Igor L.
Publication year - 2019
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201901574
Subject(s) - cycloaddition , chemistry , cleave , double bond , reactivity (psychology) , stereochemistry , derivative (finance) , ring (chemistry) , heteroatom , polymer chemistry , catalysis , organic chemistry , enzyme , medicine , alternative medicine , pathology , financial economics , economics
1,3,2‐Diazagalols reveal a high reactivity towards carbon–heteroatom double bonds of isocyanates. Gallylene [(dpp‐dad)Ga I ] − [Na] + can cleave the C=O and C=N bonds, resulting in coupling products [ArN(‐C(O)‐NAr) 2 ] 2− or [CyN(O)C=O] 2− , or derivative with a Ga 2 O 2 core. In contrast, reactions of digallane [(dpp‐bian)Ga II –Ga II (dpp‐bian)] with RNCO result in cycloaddition to a diazagalol ring. In contrast to isothiocyanates (see Chem. Eur. J . 2018 , 24 , 14994) the internal double bonds of RNCO are involved in the cycloaddition instead of the terminal ones. More information can be found in the Full Paper by Y. Zhao, X.‐J. Yang, I. L. Fedushkin, et al. on page 8259.