Publikace detail

Less Is More: Three-Coordinate C,N-Chelated Distannynes and Digermynes

Rok: 2015

Druh publikace: článek v odborném periodiku

Název zdroje: Chemistry - A European Journal

Název nakladatele: Wiley-VCH

Místo vydání: Weinheim

Strana od-do: 7820-7829

Tituly:

Jazyk	Název	Abstrakt	Klíčová slova
cze	Více je méně : Tří koordinované C,N-Chelatované Distannyny a Digermyny	Byly připraveny tří koordinované C,N-Chelatované Distannyny a Digermyny (LM)2 (M=Sn, Ge,) obsahující C,N-ligandy L-3,L-4 , kde L-4=[2,4-di-tBu-6-{(C6H3-2,6-iPr(2))N=CH}C6H2](-)) a L-3=[2,4-di-tBu-6-(Et2NCH2)C6H2](-).	koordinované C,N-Chelatované Distannyny; Digermyny
eng	Less Is More: Three-Coordinate C,N-Chelated Distannynes and Digermynes	We report here the synthesis of new C,N-chelated chlorostannylenes and germylenes (LMCl)-M-3 (M=Sn(1), Ge (2)) and (LMCl)-M-4 (M=Sn(3), Ge (4)) containing sterically demanding C,N-chelating ligands L-3,L-4 (L-3=[2,4-di-tBu-6-(Et2NCH2)C6H2](-)(;) L-4=[2,4-di-tBu-6-{(C6H3-2,6-iPr(2))N=CH}C6H2](-)). Reductions of 1-4 yielded three-coordinate C,N-chelated distannynes and digermynes [(LM)-M-3,4](2) for the first time (5: L-3, M=Sn, 6: L-3, M=Ge, 7: L-4, M=Sn, 8: L-4, M=Ge). For comparison, the four-coordinate distannyne [(LSn)-Sn-5](2) (10) stabilized by N,C,N-chelate L-5 (L-5=[2,6-{(C6H3-2,6-Me-2)NCH}(2)C6H3](-)) was prepared by the reduction of chlorostannylene (LSnCl)-Sn-5 (9). Hence, we highlight the role of donor-driven stabilization of tetrynes. Compounds 1-10 were characterized by means of elemental analysis, NMR spectroscopy, and in the case of 1, 2, 5-7, and 10, also by single-crystal X-ray diffraction analysis. The bonding situation in either three- or four-coordinate distannynes 5, 7, and 10 was evaluated by DFT calculations. DFT calculations were also used to compare the nature of the metal-metal bond in three-coordinate C,N-chelating distannyne [(LSn)-Sn-3](2) (5) and related digermyme [(LGe)-Ge-3](2) (6).	coordination modes; density functional calculations; germanium; main-group chemistry; NMR spectroscopy; tin

Vyhledávání

Přihlášení pro studenty

Přihlášení pro zaměstnance

Publikace detail

Katedry

Ústavy a pracoviště

Jak nás najdete?

Služby

Často hledáte