Die ungewöhnliche Umwandlung von P(SnMe3)3 in P4(SnMe2)6
摘要:
Das stannylierte Phosphan P(SnMe3)3 reagiert in Anwesenheit geringer Mengen von [(ZnCl)2Fe(CO)4(THF)2] in THF (Tetrahydrofuran) bei Raumtemperatur zu der auserst schwerloslichen Verbindung P4(SnMe2)6 (1)。Diese kristallisiert direkt aus der Reaktionslosung in Form farbloser Nadeln (Raumgruppe Cmcm, a = 1593, 6(3) pm, b = 1118, 2(2), c = 1602, 5(3), Z = 4)。Die Reaktion von ZnCl2 mit P(SnMe3)3 fuhrt unter
Synthesis and Reactivity of New Bis(tetramethylpiperidino)(phosphanyl)alumanes
作者:Tassilo Habereder、Heinrich Nöth、Robert T. Paine
DOI:10.1002/ejic.200700415
日期:2007.9
Syntheses for the newbis(2,2,6,6-tetramethylpiperidino)(phosphanyl)alumanes, tmp2AlP(SiMe3)2, tmp2AlP(SnMe3)2 and (tmp2Al)2PPh are described along with spectroscopic characterization and X-ray crystallographic structure determinations. In addition, the insertion reactions between tmp2AlP(SiMe3)2 and CO2, COS and CS2 are described and compared with the outcomes for CO2 insertion reactions with tmp2AlCl
Synthesis of the first fluoro(phosphanyl)- and diphosphanyl-stannanes and surprising formation of [P(SnMe<sub>3</sub>)<sub>4</sub>]<sup>+</sup>SiF<sub>5</sub><sup>−</sup>
作者:Matthias Driess、Klaus Merz、Christian Monsé
DOI:10.1039/b308660g
日期:——
Monophosphanylation of the difluorostannane Is2SnF2
(Is = 2,4,6-triisopropylphenyl) with Si(PH2)4 furnishes the first isolable fluoro(phosphanyl)stannane Is2Sn(F)PH2 1, which readily undergoes unique SiO2-assisted decompostion to [Is2Sn(PH)]2 2 and HF, while further phosphanylation of 1 leads to the remarkably stable diphosphanylstannane Is2Sn(PH2)2 3; the latter reacts with Me3SnF at the glass-wall to give the first perstannylphosphonium pentafluorosilicate [P(SnMe3)
4]+SiF5â 4.
Studies of tungsten-183 magnetic shielding by heteronuclear magnetic double and triple resonance
作者:H. Christina E. McFarlene、William McFarlane、David S. Rycroft
DOI:10.1039/dt9760001616
日期:——
1 H-183W}, 1H-31P}, and 1H-183W, 31P} nuclear magnetic double- and triple-resonance experiments have been used to determine tungsten-183 chemical shifts and other parameters in 35 tungsten(0) complexes with tertiary phosphine, η-cyclopentadienyl, and other ligands. The observed chemical shifts are several thousand p.p.m. to high field of those for derivatives of WF6, and this is attributed to the
1 H- 183 W}, 1 H- 31P}和1 H- 183 W, 31 P}核磁共振双共振和三共振实验已用于确定35中钨183的化学位移和其他参数钨( 0)与叔膦,η-环戊二烯基和其他配体的配合物。观察到的化学位移是WF 6衍生物的高场的几千ppm,这归因于除了d x 2 - y 2之外,还占据了d xy,d yz和d xz价态轨道。d z 2,它减少了电子的不平衡并且给出了一个较小的顺磁项。与配体的π背键会产生高场偏移,并且屏蔽层对温度和同位素取代的显着敏感性归因于电子激发能的变化。
Reactions of Imidazolio‐Phosphides with Organotin Chlorides: Surprisingly Diverse
作者:Florian Goerigk、Nicholas Birchall、Christoph M. Feil、Martin Nieger、Dietrich Gudat
DOI:10.1002/ejic.202101026
日期:2022.3.18
Reactions of imidazolio-phosphides (“imidazolylidene-phosphinidenes”) with organotin mono- and dihalides follow different reaction channels. DFT studies reveal that the structurally different products observed represent the most stable species under the specific reaction conditions and indicate that the switch between different reaction modes is controlled by the Lewis acidity of the electrophile employed
A general synthetic route to bis(stannyl)phosphanyl-substituted dichlorosilanes/germanes of the type R–SiCl2–P(SnMe3)2 and R–GeCl2–P(SnMe3)2 is reported. For R = Cp* (= 1,2,3,4,5-pentamethylcyclopentadienyl) crystal structures for the corresponding silane and germane could be obtained. These compounds are the first structurally characterized bis(stannyl)phosphanyl-substituted dichlorosilanes/germanes