Metal-Involving Chalcogen Bond. The Case of Platinum(II) Interaction with Se/Te-Based σ-Hole Donors
作者:Anton V. Rozhkov、Eugene A. Katlenok、Margarita V. Zhmykhova、Alexander Yu. Ivanov、Maxim L. Kuznetsov、Nadezhda A. Bokach、Vadim Yu. Kukushkin
DOI:10.1021/jacs.1c06498
日期:2021.9.29
because of more efficient orbital overlap. The association of 2 with (4-NC5F4)2Te and the structure of the formed adduct in CDCl3 solutions was studied by using 1H, 13C, 19F, 195Pt, 125Te NMR, 19F–1H HOESY, and diffusion NMR methods. The 195Pt and 125Te NMR titration and the isothermaltitration calorimetry results revealed a 1:1 association of 2 with (4-NC5F4)2Te.
铂 (II) 配合物表现出带正电荷的金属中心的d z 2 -亲核性,即 [Pt(ppy)(acac)] ( 1;acacH 是乙酰丙酮;ppyH 是 2-Ph-吡啶) 和 [Pt( ppy)(tmhd)] ( 2 ; tmhdH 是 2,2,6,6-四甲基庚二酮-3,5),与硫属键供体 (4-NC 5 F 4 ) 2 Ch (Ch = Se, Te)共结晶形成两个同构共晶1 · 1 / 2 (4-NC 5 F 4 ) 2 Ch, 和2 · 2 / 3 (4-NC 5 F4 ) 2 Se 和2 ·(4-NC 5 F 4 ) 2 Te。这些共晶的 X 射线数据和适当的理论 DFT 计算 (PBE0-D3BJ) 允许识别包含金属的硫属元素键,即 Ch... d z 2 -Pt II(其能量跨度从 -7 到 - 12 大卡/摩尔)。在1 · 1 / 2 (4-NC 5 F 4 ) 2 Ch, Ch
Bis(perfluoroaryl)chalcolanes Ar<sup>F</sup><sub>2</sub>Ch (Ch = S, Se, Te) as σ/π-Hole Donors for Supramolecular Applications Based on Noncovalent Bonding
作者:Anton V. Rozhkov、Margarita V. Zhmykhova、Yury V. Torubaev、Eugene A. Katlenok、Dmitry M. Kryukov、Vadim Yu. Kukushkin
DOI:10.1021/acs.cgd.2c01454
日期:——
were determined by X-ray crystallography. In the solid state, compounds ArF2Ch are self-associated via σ-(Ch)-hole interactions with F (or N for 8B) and also π–π stacking between the arenes. The σ/π-hole donor properties of ArF2Ch were evaluated by molecular electrostatic potential surface analysis using the density functional theory approach. The maximum Vs(σ-hole) values (from +25 to +38 kcal/mol)
全氟芳烃(全氟吡啶、全氟甲苯和全氟联苯)通过开发的一锅法转化为双(全氟芳基)查尔醇 Ar F 2 Ch(Ch = S 59–88%、Se 54–84%、Te 10–41%)方法。该方法包括生成 Na 2 Ch(通过 Na + [C 10 H 8 ] · –系统还原 Ch 原位形成),然后用任何一种芳烃处理。(4-NC 5 F 4 ) 2 S ( 2 ), (C 12 F 9 ) 2 S ( 3 ) (p -CF 3 C 6 F 4 ) 2 Se ( 4 )、(C 12 F 9 ) 2 Se ( 6 A,B;两个多晶型物)、(C 12 F 9 ) 2 Te ( 9 ) 和 (4-NC 5 F 4 ) 2 Te ( 8 B;一种新型多晶型物) 通过X 射线晶体学测定。在固态下,化合物 Ar F 2 Ch 通过 σ-(Ch)-hole 相互作用与 F(或 N for 8 B)自缔合) 以及芳烃之间的
4-Tetrafluoropyridyl Silver(I), AgC<sub>5</sub>F<sub>4</sub>N, in Redox Transmetalations with Selenium and Tellurium
structures of both derivatives exhibit infinite chains caused by a weak intermolecular contact between the chalcogen and one nitrogen atom with a T-shaped (ψ-pentagonal-bipyramidal) ligand arrangement. Crystallization of both reagents from dimethylsulfoxide gave single crystals of the corresponding 1:1adducts that crystallize in infinite chains best expressed by the formula [E(C5F4N)2·(μ-DMSO)]∞ (E =
通过AgC 5 F 4 N和相应元素的氧化还原金属转移,以高收率制备了Se(C 5 F 4 N)2和Te(C 5 F 4 N)2。两种衍生物的晶体结构均显示出无限的链,这是由于硫族元素与一个氮原子之间呈T形(ψ-五边形-双锥体)配体排列而引起的分子间的弱接触而引起的。从二甲基亚砜两种试剂的结晶,得到相应的1-单晶:1加合物,在无限链结晶最好由式[E(C表示5 ˚F 4 N)2 ·(μ-DMSO)] ∞(E = Se,Te)。在这些情况下,硒和碲的配位范围为正方形(ψ-八面体)。在[Te(C 5 F 4 N)2 ·TMTU] ∞和[Te(C 6 F 5)2 ·TMTU] ∞(TMTU =四甲基硫脲)的分子结构中发现相似的作用。Te–S原子间距离的差异清楚地表明,与C 6 F 5基团相比,C 5 F 4 N配体的吸电子量要大得多。也就是说,Te(C 5 F 4 N)2是更强的路易斯酸。