New examples of B9 and B11 polyhedral borane derivative chemistry
作者:Edward H. Wong、Michael G. Gatter
DOI:10.1016/s0020-1693(00)89124-0
日期:1982.1
Reaction of acetic anhydride/DMSO with B11H2−11 yielded its dimethyl-sulphido-derivative which is fluxional in soltion. These compounds represent the first examples of non-halogenated derivatives of the B9 and B11 polyhedralboranes
C(sp<sup>3</sup>)–H Fluorination with a Copper(II)/(III) Redox Couple
作者:Jamey K. Bower、Andrew D. Cypcar、Brenda Henriquez、S. Chantal E. Stieber、Shiyu Zhang
DOI:10.1021/jacs.0c02583
日期:2020.5.6
initiate and terminate a C(sp3)-H halogenation sequence. While all three copper(III) halide complexes capture carbon radicals efficiently to afford C(sp3)-halogen bonds, LCuF is two orders of magnitude more efficient at hydrogen atom abstraction (HAA) than LCuCl and LCuBr. Alongside reported kinetic data for other LCu(III) species, we established a positive correlation between ligand basicity and the
Heavy silylchalcogenido lanthanates synthesis Ph<sub>4</sub>P[Cp<sub>3</sub>La–ESiMe<sub>3</sub>] (E = S, Se, and Te) <i>via</i> fluoride-induced demethylation of dimethylcarbonate to Ph<sub>4</sub>P[OCO<sub>2</sub>Me] key intermediate
silylchalcogenide salts Ph4P[ESiMe3] (E = S, Se, and Te) including the first example of a structurally characterized non-coordinating, naked [Te–SiMe3]− anion is presented. With this set of soft Lewis bases and metal organic Lewis acids [Cp3La] at hand, a comprehensive series of crystalline 1 : 1 lanthanate complexes Ph4P[Cp3La–ESiMe3] has been prepared. Their structural features and trends such as complexation
Synthesis and reactivity of technetium(VII) imido complexes
作者:Jeffrey C. Bryan、Anthony K. Burrell、Mary M. Miller、Wayne H. Smith、Carol J. Burns、Alfred P. Sattelberger
DOI:10.1016/s0277-5387(00)84611-2
日期:1993.7
Abstract The synthesis, characterization and electrochemistry of a series of new technetium complexes, Tc(NAr)3X and Tc(NAr′)3X (X = OSiMe3, alkyl, I), is reported. These complexes are shown to be resistant to reduction and moderately air-sensitive. The siloxy complex Tc(NAr)3(OSiMe3) (1a) reacts with fluoride ion to give the tris(imido)oxo anion [TcO(NAr)3]−. Less sterically hindered M(Nar′)3(OSiMe3)
Correction to “C(sp<sup>3</sup>)–H Fluorination with a Copper(II)/(III) Redox Couple”
作者:Jamey K. Bower、Andrew D. Cypcar、Brenda Henriquez、S. Chantal E. Stieber、Shiyu Zhang
DOI:10.1021/jacs.2c02407
日期:2022.4.6
LUNO is copper-centered, reflecting an inverted ligand field. The leading electronic configuration of all complexes remains L1d1, placing one electron in each orbital, which we still interpret as copper(II) bound to a ligand-centered radical, denoted CuII–X•. Figure 5 in the main text has also been corrected here (Figure 1) to reflect these changes. Figure 1. (a) Localized HONO and LUNO from the CASSCF
第 8517 页。考虑到最近的计算工作,(1)我们重新审视了原始论文中描述的多参考计算。Vlaisavljevich、Tolman 和同事计算了铜 (III) 卤化物配合物的 CASSCF 波函数,发现局部 CAS-CI 计算的结果与我们最初报告的结果不同。虽然他们最初的 CASSCF 结果在质量上与我们的相同,但发现本地化 CAS-CI 结果之间存在差异。为了调查这种差异,我们重新审视了我们的本地化程序和随后的 CAS-CI 计算。筛选 ORCA 中可用的定位程序(PM、FB、NEWBOYS、IAO-IBO 和 IAO-BOYS),我们发现L CuCl 和L的轨道存在细微差异比较不同轨道定位方案时的 CuBr(支持信息,图 S51 和 S52)。无论定位方案如何,L CuF的轨道基本相同。此外,对于所有三种配合物,L 2 d 0、L 0 d 2和 L 1 d 1的相对贡献(L 代表配体中心轨道;d