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dc.contributor.author | Gurina G.A. | |
dc.contributor.author | Kissel A.A. | |
dc.contributor.author | Lyubov D.M. | |
dc.contributor.author | Luconi L. | |
dc.contributor.author | Rossin A. | |
dc.contributor.author | Tuci G. | |
dc.contributor.author | Cherkasov A.V. | |
dc.contributor.author | Lyssenko K.A. | |
dc.contributor.author | Shavyrin A.S. | |
dc.contributor.author | Ob'Edkov A.M. | |
dc.contributor.author | Giambastiani G. | |
dc.contributor.author | Trifonov A.A. | |
dc.date.accessioned | 2021-02-25T20:43:42Z | |
dc.date.available | 2021-02-25T20:43:42Z | |
dc.date.issued | 2020 | |
dc.identifier.issn | 1477-9226 | |
dc.identifier.uri | https://dspace.kpfu.ru/xmlui/handle/net/162312 | |
dc.description.abstract | This journal is © The Royal Society of Chemistry. New neutral bis(alkyl) Sc and Y complexes [N,Npy,N-]Ln(CH2SiMe3)2(THF)n [n = 0, Ln = Sc (1Sc), Y (1Y); n = 1, Ln = Y (1YTHF)] stabilized by a tridentate monoanionic amidopyridinate ligand were straightforwardly prepared by alkane elimination, upon mixing ligand [N,Npy,N-]H and metal precursor Ln(CH2SiMe3)3(THF)2 in toluene at 0 °C. Depending on the work-up conditions, yttrium bis(alkyl)s were isolated as either a pentacoordinate Lewis base free complex [N,Npy,N-]Y(CH2SiMe3)2 (1Y) or as a hexacoordinate THF adduct [N,Npy,N-]Y(CH2SiMe3)2THF (1YTHF). For the smaller Sc ion the only solvent-free complex [N,Npy,N-]Y(CH2SiMe3)2 (1Sc) was isolated as a pentacoordinate species irrespective of the reaction/work-up/crystallization conditions applied. Complexes 1Ln (Ln = Y, Sc) and 1YTHF were scrutinized as pre-catalysts in ternary catalytic systems Ln/borate/AliBu3 (borate = [HNMe2Ph][B(C6F5)4] or [Ph3C][B(C6F5)4]), applied to isoprene (IP) polymerization, providing moderate activity albeit high selectivity with predominant formation of 1,4-cis polyisoprene (up to 99%). The same complexes proved to be effcient catalysts also for the intermolecular hydrolelementation of styrene with various EH sustrates (pyrrolidine, morpholine, Ph2PH, PhPH2, PhSH) affording linear anti-Markovnikov addition products exclusively. After a preliminary activation by B(C6F5)3, selected bis(alkyl) complexes from this series have been finally used as valuable pre-catalysts for the CO2 hydrosylilation to CH4 in the presence of organosilanes as reducing agents (PhMe2SiH, PhSiH3, Et2MeSiH). | |
dc.relation.ispartofseries | Dalton Transactions | |
dc.title | Bis(alkyl) scandium and yttrium complexes coordinated by an amidopyridinate ligand: Synthesis, characterization and catalytic performance in isoprene polymerization, hydroelementation and carbon dioxide hydrosilylation | |
dc.type | Article | |
dc.relation.ispartofseries-issue | 3 | |
dc.relation.ispartofseries-volume | 49 | |
dc.collection | Публикации сотрудников КФУ | |
dc.relation.startpage | 638 | |
dc.source.id | SCOPUS14779226-2020-49-3-SID85078365753 |