Zerovalent titanium–sulfur complexes. Novel dithiocarbamato derivatives of Ti(CO)<sub>6</sub>: [Ti(CO)<sub>4</sub>(S<sub>2</sub>CNR<sub>2</sub>)]<sup>−</sup>
作者:Robert E. Jilek、Giovanna Tripepi、Eugenijus Urnezius、William W. Brennessel、Victor G. Young, Jr.、John E. Ellis
DOI:10.1039/b700808b
日期:——
Oxidation of [Ti(CO)6]2â by thiuram disulfides, (R2NCS2)2, affords the first isolable mononuclear six-coordinate titanium(0) carbonyls, [Ti(CO)4(S2CNR2)]â, which have unusual trigonal prismatic geometries and chemical and spectral properties that are remarkably similar to those of the 18-electron and seven-coordinate anion [Ti(CO)4(η5-C5H5)]â.
Switchable π-coordination and C–H metallation in small-cavity macrocyclic uranium and thorium complexes
作者:Polly L. Arnold、Joy H. Farnaby、Rebecca C. White、Nikolas Kaltsoyannis、Michael G. Gardiner、Jason B. Love
DOI:10.1039/c3sc52072b
日期:——
demonstrating the preference for arene binding by the electron-rich UIII ion. Facile loss of THF from [UI(THF)(L)] further increases the amount of U–arene back donation. [UI(L)] can incorporate a further UIII equivalent, UI3, to form the very unusual dinuclear complex [U2I4(L)] in which the single macrocycle adopts both κ5:κ5 and η6:κ1:η6:κ1 binding modes in the same complex. Hybrid density functional theory
小腔,二吡咯化物,双阴离子大环反式杯[2]苯[2]吡咯化物(L)的新的,受构象限制的Th IV和U IV配合物[ThCl 2(L)]和[UI 2(L)] )2-被报告,并示出为具有不寻常的κ 5:κ 5在弯曲金属茂型结构结合。[UI的单电子还原2(L)],得到[UI(THF)(L)]并导致开关中配体的结合κ 5 -pyrrolide至η 6 -arene夹心配位,表明对于芳烃通过结合偏好富电子的U III离子。[UI(THF)(L)]中THF的少量损失进一步增加了U–arene返体捐赠的数量。[UI(L)]可以结合进一步ü III当量,UI 3,以形成非常不寻常的双核配合物[C 2我4(L)],其中,单个大环化合物采用两个κ 5:κ 5和η 6:κ 1:η 6:κ 1结合在相同的复杂模式。进行了混合密度泛函理论计算,以比较[U III I(L)]和[U III 2 I 4(L)]表示[U 2
Mixed-Valent Diiron μ-Carbyne, μ-Hydride Complexes: Implications for Nitrogenase
作者:Charles H. Arnett、Isabel Bogacz、Ruchira Chatterjee、Junko Yano、Paul H. Oyala、Theodor Agapie
DOI:10.1021/jacs.0c05920
日期:2020.11.4
both species are mixed valent and populate S = ½ states at low temperatures, spectro-scopic and computational studies reveal that only the cationic complex [(P6ArC)Fe2(µ-H)]1+ is valence localized, allowing an evaluation of the effects of geometrical distortions and vibronic trapping on the electronic structure of the biologically relevant Fe(µ-CAr)(µ-H)Fe motif. The influence of valence localization on
Attempting to Reduce the Irreducible: Preparation of a Rare Paramagnetic Thorium Species
作者:Ilia Korobkov、Balamurugan Vidjayacoumar、Serge I. Gorelsky、Paul Billone、Sandro Gambarotta
DOI:10.1021/om900996n
日期:2010.2.8
6H4}ThCl(μ-Cl)2[Li(DME)]2 (2b) were isolated and fully characterized. The common feature among these two species is that the switching of bonding mode of the pyrrolide rings, resulting from the coordination of the aluminum residues, is accompanied by deprotonation of the central ring. Attempts to reduce 1 yielded the paramagnetic [η5-1,3-[(η5-2-C4H3N)(CH3)2C]2C6H4}ThK(μ-Cl)3][Li(DME)3] (3), which
cleavage, and an amide complex [K(thf)2}(O3C)ZrN(SiMe3)2}(thf)] (4) was isolated. Analogously, treatment of 2 with mesityl azide (MesN3) followed by addition of Me3SiN3 afforded [K(thf)2}(O3C)ZrN(Mes)(SiMe3)}(thf)] (5). Hydrogenation of 2 provided a hydride-bridged dizirconium complex [K(thf)2}3(O3C)Zr}2(μ-H)3] (6) along with tetralin. The solid-statestructures of 2, 4, and 5 were established by
用2处理[(O 3 C)Zr(thf)3 ](1 ; [O 3 C] 4− = [(3,5- t Bu 2 -2-OC 6 H 2)3 C] 4−)当量 萘基钾在DME的制备[K(DME)} 2(O 3 C)的Zr(C 10 H ^ 8)](2),其中,所述[(O 3 C)的Zr]片段是η 4结合的一个萘配体的环。配合物2与游离萘进行了容易的交换,并将蒽加入到图2所示的结果是蒽络合物[K 2(dme)3 }(O 3 C)Zr(C 14 H 10)](3)的干净形成。的反应2与过量的Me 3的SiN 3涉及生成的酰亚胺中间体的经由N个挤出2和SiN键裂解,和酰胺络合物[K(THF)2 }(O 3 C)的Zr N分离出(SiMe 3)2 }(thf)](4)。类似地,治疗的2与三甲苯基叠氮化物(MESN 3),然后添加Me 3 SiN 3得到[K(thf)2 }(O 3 C)Zr N(Mes)(SiMe