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Abstract Reactions of L(Cl)Ga‐substituted stibine L(Cl)Ga 2 SbCl (L=HCC(Me)NAr 2 ; Ar=2,6‐ i ‐Pr 2 C 6 H 3 ) with N‐heterocyclic carbenes R NHC Me ( R NHC Me =C(R)NMe 2 C:; R=Me, Et, i Pr) gave NHC‐coordinated stibinidenes L(Cl)GaSb‐ R NHC Me (R=Me 1 a , Et 1 b , i Pr 1 c ) and distibenes L(Cl)GaSbSb( R NHC Me )Ga(Cl)L (R=Me 2 a , Et 2 b , i Pr 2 c ). Distibenes 2 a and 2 b react with a second equivalent of R NHC Me with cleavage of the Sb−Sb double bond and formation of stibinidenes 1 a and 1 b. 1 a – 2 b were spectroscopically characterized and the solid‐state structures determined by single crystal X‐ray diffraction (sc‐XRD). Quantum chemical calculations gave a deeper insight into the electronic nature and bonding situation of 1 a – 2 c and the reaction energetics were investigated in detail.
Krüger et al. (Thu,) studied this question.