Phosphirenium borate betaines from alkynylphosphanes and the halogeno-B(C<sub>6</sub>F<sub>5</sub>)<sub>2</sub> reagents
作者:Atsushi Ueno、Jennifer Möricke、Constantin G. Daniliuc、Gerald Kehr、Gerhard Erker
DOI:10.1039/c8cc07189f
日期:——
of phosphanyl substituted alkynes R12P–CC–R2 [R12P: Mes2P or tBu2P; R2: SiMe3, Ph, tBu] reacts with the X–B(C6F5)2 reagents [X: Cl, Br] to give thermally rather stable neutral zwitterionic phosphirenium borate products. Five examples of this class of compounds were characterized by X-ray diffraction.
一系列膦酰基取代的炔烃R 1 2 P– CC C–R 2 [R 1 2 P:Mes 2 P或t Bu 2 P;R 2:SiMe 3,Ph,t Bu]与X–B(C 6 F 5)2试剂[X:Cl,Br]反应,得到热稳定的中性两性离子硼酸磷鎓产物。此类化合物的五个实例通过X射线衍射表征。
Phosphirenium-borate zwitterion: formation in the 1,1-carboboration reaction of phosphinylalkynes
Reaction of the acetylene Mes2P–CC–Ar with B(C6F5)3 at rt gives a zwitterionic phosphirenium product, which reacts further at >100 °C to complete the 1,1-carboboration reaction.
乙炔 Mes2P–CC–Ar 与 B(C6F5)3 在室温下反应,得到两性离子磷鎓产物,该产物在 >100 °C 下进一步反应,完成 1,1-碳硼化反应。
P−C Bond Activation Chemistry: Evidence for 1,1-Carboboration Reactions Proceeding with Phosphorus−Carbon Bond Cleavage
at one former acetylene carbon atom and a C(6)F(5) substituent and the remaining -B(C(6)F(5))(2) group at the other. Prolonged thermolysis of 4d resulted in an intramolecular aromatic substitution reaction by means of Ph(2)P attack on the adjacent C(6)F(5) ring to yield the zwitterionic phospha-indene derivative 7. The compounds 4a, 4c, 4d, and 7 were characterized by X-ray diffraction.
Unusual 1,1-Hydroboration Route to a Reactive Unsaturated Vicinal Frustrated Phosphane/Borane Lewis Pair
作者:Atsushi Ueno、Xin Tao、Constantin G. Daniliuc、Gerald Kehr、Gerhard Erker
DOI:10.1021/acs.organomet.8b00481
日期:2018.8.27
Piers’ borane HB(C6F5)2 reacted with the alkyne Mes2P–C≡C–SiMe3 by a rarely observed 1,1-hydroboration reaction under kinetic control to give the unsaturated vicinal frustrated phosphane/boraneLewispair 6, featuring both the PMes2 and SiMe3 groups at the same carbon atom C1. Compound 6 is a reactive P/B FLP which splits dihydrogen under mild conditions. Thermolysis at 100 °C converts it to the markedly
皮尔斯的硼烷HB(C 6 F 5)2与炔烃Mes 2 P–C≡C–SiMe 3在动力学控制下通过罕见的1,1-氢硼化反应进行反应,得到不饱和的邻位受阻的膦/硼烷路易斯对6,在同一碳原子C1上同时具有PMes 2和SiMe 3基团。化合物6是一种反应性P / B FLP,可在温和条件下裂解二氢。在100°C的温度下将其转化为反应性明显较低的P / B FLP区域异构体,该异构体在与B(C 6 F 5)2相邻的碳原子C2处带有-SiMe 3取代基团体。大多数新化合物通过X射线衍射表征。
Synthesis and Reactivity of Indium(I) 1-Carba-<i>closo</i>-undecachlorododecaborate
作者:Khalid M. Osman、Douglas R. Powell、Rudolf J. Wehmschulte
DOI:10.1021/acs.inorgchem.5b01629
日期:2015.9.21
arene-solvated indium(I) species [In(C7H8)3][CHB11Cl11] (1) and [In(C6H5Br)1.5][CHB11Cl11] (2) were obtained by a redox reaction involving the silver salt Ag[CHB11Cl11] and indium powder at 80 °C in a toluene or bromobenzene solution. These thermally stable compounds react with triphenylphosphine and the N-heterocyclic carbene 1,3-bis(2,6-diisopropylphenyl)imidazol-2-ylidene under reduction of indium(I) to indium
芳烃溶剂化的铟(I)种类[In(C 7 H 8)3 ] [CHB 11 Cl 11 ](1)和[In(C 6 H 5 Br)1.5 ] [CHB 11 Cl 11 ](2)为通过涉及银盐Ag [CHB 11 Cl 11的氧化还原反应获得]和铟粉在80°C下的甲苯或溴苯溶液中。这些热稳定的化合物与三苯基膦和N-杂环卡宾1,3-双(2,6-二异丙基苯基)咪唑-2-亚烷基在铟(I)还原为铟金属并将配体氧化为to和咪唑鎓阳离子的条件下反应与更普遍观察到的歧化反应相反。卡宾2当量的存在会导致阴离子去质子化,生成二价阴离子[CB 11 Cl 11 ] 2–。在相互作用+软供体配体,例如膦,烯烃,炔烃,和芳烃是弱,和结晶固体仅与非易失性phosphinoacetylene的Mes得到2 PC≡CPh(MES = 2,4,6-ME3 C 6 H 2)。该化合物的结构显示出In···C相互作用,涉及一个三基