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Synthesis and Reactivity of Donor‐Stabilized Bis(pentafluoroethyl)stannylene [Sn(C 2 F 5 ) 2 (D) n ] (D=THF, DMAP, PMe 3 , [Sn(C 2 F 5 ) 3 ] − )
Author(s) -
Klösener Johannes,
Wiesemann Markus,
Niemann Mark,
Neumann Beate,
Stammler HansGeorg,
Hoge Berthold
Publication year - 2018
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201705770
Subject(s) - steric effects , chemistry , reactivity (psychology) , pyridine , bimetallic strip , medicinal chemistry , diethyl ether , tin , molecule , ether , metal , stereochemistry , crystallography , organic chemistry , medicine , alternative medicine , pathology
In this contribution we report on the synthesis of bis(pentafluoroethyl)stannane, H 2 Sn(C 2 F 5 ) 2 . In the reaction with donor molecules a ready elimination of hydrogen and the formation of the corresponding donor‐stabilized monomeric bis(pentafluoroethyl)stannylene, Sn(C 2 F 5 ) 2 , becomes apparent. With dependence on the Lewis basicity and steric demand of the donor, varying coordination numbers are realized. Whereas the reaction with nitrogen bases like 4‐(dimethylamino)pyridine (DMAP) leads to the complexation of two donor molecules, [Sn(C 2 F 5 ) 2 (dmap) 2 ], treatment with PMe 3 or [Sn(C 2 F 5 ) 3 ] − furnished the corresponding neutral or anionic monoadducts, [Sn(C 2 F 5 ) 2 (D)] (D=PMe 3 , [Sn(C 2 F 5 ) 3 ] − ). In contrast, the utilization of sterically demanding donors, such as i Pr 2 O, as well as the thermal treatment of ether complexes, [Sn(C 2 F 5 ) 2 (D) n ] (D=Et 2 O, THF), leads to the formation of oligomeric and cyclic stannylene moieties [Sn(C 2 F 5 ) 2 ] n . The reactivity of H 2 Sn(C 2 F 5 ) 2 and the donor‐stabilized stannylenes was proven by hydrostannylation and complexation reactions with tetracarbonylnickel and bimetallic compounds. In the latter case, a donor‐dependent stannylene or distannylene insertion into the metal–metal bond was observed.