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Jaeger, Ruben; Rachor, Simon G.; Ahrens, Mike; Braun, Thomas
Chemistry : a European journal, 07/2024, Letnik: 30, Številka: 41Journal Article
Abstract The κ 2 ‐(P,N)−phosphine ligand precursor NH(CH 2 CH 2 PCy 2 ) 2 can be used for the synthesis of the rhodium(I) complex Rh(CO){ ĸ 3 ‐(P,N,P)−Cy 2 PC 2 H 4 NHC 2 H 4 PCy 2 }Cl ( 1 ). The deprotonated complex Rh(CO){ ĸ 3 ‐(P,N,P)−Cy 2 PC 2 H 4 NC 2 H 4 PCy 2 } ( 2 ) shows a cooperative reactivity of the PNP ligand in the activation reaction of SO 2 F 2 to yield the rhodium fluorido complex trans ‐Rh(F)(CO){ ĸ 2 ‐(P,P)−Cy 2 PC 2 H 4 N(SO 2 F)C 2 H 4 PCy 2 } 2 ( 3 ) by S−F bond cleavage. It is remarkable that no reaction was observed when 3 was treated with hydrogen sources e. g. dihydrogen, organosilicon compounds such as triethylsilane or TMS−CF 3 and different fluorine sources such as SF 4 or Selectfluor®. However, the treatment of complex 3 with XeF 2 in the presence of CsF resulted in the formation of the unique fluorido rhodium(III) complex cis , trans ‐Rh(F) 3 (CO){ ĸ 2 ‐(P,P)−Cy 2 PC 2 H 4 N(SO 2 F)C 2 H 4 PCy 2 } 2 ( 4 ). In the presence of pyridine(HF) X or BF 3 the fluorido complex 3 converted into the dicationic complexes Rh(CO){ ĸ 2 ‐(P,P)−Cy 2 PC 2 H 4 N(SO 2 F)C 2 H 4 PCy 2 } 2 XF 2 , X=HF ( 5 ) or BF 3 ( 6 ), respectively.
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