Synthesis and Crystal Structures of Nickel(II) and Palladium(II) Complexes with o-Carboranyl Amidine Ligandsстатья
Статья опубликована в высокорейтинговом журнале
Информация о цитировании статьи получена из
Web of Science,
Scopus
Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 30 апреля 2021 г.
Аннотация:A number of new nido-carboranyl amidines 10-R(CH2)nNHC(Et)=HN-7,8-C2B9H11 (n = 2, R = OH, OMe, NMe2; n = 3, R = OH) were synthesized by nucleophilic addition of amino alcohols and N,N-dimethylethylenediamine to the highly activated -C≡N+- triple bond of the 10-propionitrilium derivative of nido-carborane. A similar reaction of 10-EtC≡N-7,8-C2B9H11 with ethylenediamine unexpectedly resulted in the cleavage of the C≡N bond to form the ammonium derivative 10-H3N-7,8-C2B9H11. The complexation of the synthesized carboranyl amidines 10-MeO(CH2)2NHC(Et)=HN-7,8-C2B9H11 and 10-Me2N(CH2)2NHC(Et)=HN-7,8-C2B9H11 with nickel and palladium phosphine complexes [(Ph3P)2MCl2] (M = Ni, Pd) was studied. The reactions with 10-MeO(CH2)2NHC(Et)=HN-7,8-C2B9H11 result in the half-sandwiched metallacarborane complexes with the retention of one triphenylphosphine ligand [3-Ph3P-3-(8-MeOCH2CH2N=C(Et)NH)-3,1,2-MC2B9H10], while the reactions with 10-Me2N(CH2)2NHC(Et) =HN-7,8-C2B9H11 proceed with the complete loss of the phosphine ligands and lead to the complexes with the Ε5:κ2(N,N’)-coordinated carboranyl amidine ligand [3,3-(8-Me2NCH2CH2N= C(Et)NH)-3,1,2-MC2B9H10]. The crystal molecular structures of the synthesized complexes were determined by single crystal X-ray diffraction.