1589079-50-4Relevant academic research and scientific papers
Unique Approach to Copper(I) Silylene Chalcogenone Complexes
Parvin, Nasrina,Pal, Shiv,Khan, Shabana,Das, Shubhajit,Pati, Swapan K.,Roesky, Herbert W.
, p. 1706 - 1712 (2017)
Silylene-S-thione [PhC(NtBu)2Si(S)N(SiMe3)2] (2) and silylene-Se-selone [PhC(NtBu)2Si(Se)N(SiMe3)2] (3) compounds were prepared from the silylene [PhC(NtBu)2SiN(SiMe3/sub
Rare antimony(iii) imidazole selone complexes: Steric controlled structural and bonding aspects
Nandeshwar, Muneshwar,Adinarayana, Mannem,Srinivas, Katam,Velappan, Kavitha,Prabusankar, Ganesan
, p. 17331 - 17340 (2020)
Novel antimony(iii) imidazole selone complexes in a super crowded environment are reported for the first time. The super bulky selone antimony complexes, [{IPr?Se}(SbCl3)2] (1) and [{IPr?Se}(SbBr3)2] (2), were isolated from the reactions between IPr?Se (IPr?Se = [1,3-bis(2,6-diphenylmethylphenyl)imidazole selone]) and suitable antimony(iii) halides. 1 and 2 are dinuclear complexes with a Sb:Se ratio of 1:0.5 with an unusual coordination mode of selone. The molecules 1 and 2 consist of both Menshutkin-type Sb?πaryl interactions and a Sb-Se coordination bond. However, the reaction between antimony(iii) halides and [(IPaul)Se] ([(IPaul)Se] = [1,3-bis(2,4-methyl-6-diphenyl phenyl)imidazole selone]) with a spatially defined steric impact gave the dinuclear complex [{(IPaul)Se}(SbCl3)]2 (3) and the mononuclear complex [{(IPaul)Se}(SbBr3)] (4) without Menshutkin-type interactions. The Sb:Se ratio in 3 and 4 is 1:1. Interestingly, the Menshutkin-type interaction was absent in 3 and 4 due to the efficient coordinating ability of the ligand [(IPaul)Se] with the Sb(iii) center compared to that of the super bulky ligand IPr?Se. The thermal property of these antimony selone complexes was also investigated. Density functional theory (DFT) calculations were carried out on the model systems [L(SbCl3)2] (1A), [L(SbCl3)] (1B), [L′(SbCl3)2] (1C), and [L′(SbCl3)] (1D), where L = [1,3-bis(2,6-diisopropyl-4-methyl phenyl)imidazole selone] and L′ = [1,3-bis(phenyl)imidazole selone], to understand the nature of orbitals and bonding situations. The computed metrical parameters of 1A are in good agreement with the experimental values. Natural population analysis of the model system reveals that the natural charge and total population of antimony(iii) are comparable. The unequal interaction between selenium and antimony obtained using Wiberg bond indices (WBIs) is fully consistent with the findings of the single-crystal X-ray studies.
Straightforward access to chalcogenoureas derived from N-heterocyclic carbenes and their coordination chemistry
A. C. A. Bayrakdar, Tahani,Nahra, Fady,Nelson, David J.,Nolan, Steven P.,Saab, Marina,Tzouras, Nikolaos V.,Van Hecke, Kristof
, p. 12068 - 12081 (2020/09/21)
Chalcogen-based urea compounds supported by a wide range of N-heterocyclic carbenes are synthesised and fully characterised. Coordination of selenoureas is further explored with Group 11 transition metals to form new copper, gold and silver complexes. Sin
Methoxy-functionalized N-heterocyclic carbenes
Nelson, David J.,Collado, Alba,Manzini, Simone,Meiries, Sebastien,Slawin, Alexandra M. Z.,Cordes, David B.,Nolan, Steven P.
, p. 2048 - 2058 (2014/05/20)
The effect of methoxy functionalization of three N-heterocyclic carbene ligands was assessed using a variety of methods. The steric environment of each carbene has been assessed in various coordination environments. The electronic properties, specifically the electron-donating character and π-accepting ability, have been evaluated using nickel and iridium complexes and selenium adducts, respectively. Comparisons with the parent systems have been made with respect to both electronic and steric properties. The carbenes IPr OMe, SIPrOMe, and IPrOMe have been found to be more electron donating than the parent systems IPr, SIPr, and IPr* and only slightly less π accepting, yet they exhibit similar steric properties.
