Formation of an imidazoliumyl-substituted [(L_C)₄P₄]⁴⁺ tetracation and transition metal mediated fragmentation and insertion reaction (L_C = NHC).

ABSTRACT: Tetracationic cyclo-tetraphosphane [(L_C)₄P₄]⁴⁺ as triflate salt (3[OTf]₄) (L_C = 4,5-dimethyl-1,3-diisopropyl-imidazol-2-yl) is obtained in high yield from the reduction of [L_CPCl₂]⁺ (4[OTf]) with 1,4-bis(trimethylsilyl)-1,4-dihydropyrazine (6) and represents the first salt of the cationic cyclo-phosphane series with the general formula [L _n P _n ] ⁿ⁺. Theoretical calculations reveal the electrophilic nature of the P atoms within the P₄-ring due to the influence of the imidazoliumyl-substituents. Further reduction of 3[OTf]₄ with 6 affords the unexpected formation of the notricyclane P

SUBMITTER: Schwedtmann K 

PROVIDER: S-EPMC6640194 | biostudies-literature | 2019 Jul

REPOSITORIES: biostudies-literature