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A General Pathway for the Synthesis of Gallastibenes containing Ga=Sb Double Bonds
Author(s) -
Krüger Julia,
Ganesamoorthy Chelladurai,
John Lukas,
Wölper Christoph,
Schulz Stephan
Publication year - 2018
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.201801813
Subject(s) - chemistry , antimony , molar ratio , double bond , stereochemistry , medicinal chemistry , crystallography , catalysis , inorganic chemistry , polymer chemistry , organic chemistry
Reactions of three equivalents of LGa {L=HC[C(Me)N(2,6‐ i Pr 2 C 6 H 3 )] 2 } with SbX 3 (X=F, Cl, Br, I) proceed with insertion into the Sb−X bond, elimination of LGaX 2 , and formation of LGaSbGa(X)L (X=F 1 , Cl 2 , Br 3 , I 4 ) containing a Ga=Sb double bond. In contrast, the 2:1 molar ratio reaction of LGa and SbCl 3 initially gives the twofold insertion product [L(Cl)Ga] 2 SbCl 7 , which could not be isolated due to its strong tendency toward elimination of LGaCl 2 and formation of distibene [L(Cl)GaSb] 2 5 at 25 °C or cyclotristibine [L(Cl)GaSb] 3 6 at 8 °C. The formation of 1 – 6 can be rationalized by formation of the Ga‐substituted stibinidene L(X)GaSb as reaction intermediate.