Englert, Lukas; Stoy, Andreas; Arrowsmith, Merle; Muessig, Jonas H.; Thaler, Melanie; Deissenberger, Andrea; Haefner, Alena; Boehnke, Julian; Hupp, Florian; Seufert, Jens; Mies, Jan; Damme, Alexander; Dellermann, Theresa; Hammond, Kai; Kupfer, Thomas; Radacki, Krzysztof; Thiess, Torsten; Braunschweig, Holger published the article 《Stable Lewis Base Adducts of Tetrahalodiboranes: Synthetic Methods and Structural Diversity》. Keywords: stable Lewis base adduct tetrahalodiborane preparation crystal mol structure; phosphine carbene isonitrile tetrahalodiborane adduct preparation structural diversity; Lewis base adducts; NMR spectroscopy; crystallography; ligand exchange; tetrahalodiboranes.They researched the compound: 1,3-Bis(2,4,6-trimethylphenyl)-1,3-dihydro-2H-imidazol-2-ylidene( cas:141556-42-5 ).Formula: C21H24N2. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:141556-42-5) here.
A series of 22 new bis(phosphine), bis(carbene), and bis(isonitrile) tetrahalodiborane adducts has been synthesized, either by direct adduct formation with highly sensitive B2X4 precursors (X = Cl, Br, I) or by ligand exchange at stable B2X4(SMe2)2 precursors (X = Cl, Br) with labile dimethylsulfide ligands. The isolated compounds have been fully characterized using NMR spectroscopy, elemental anal., and, for 20 of these compounds, single-crystal x-ray diffraction, revealing an unexpected variation in the bonding motifs. In addition to the classical B2X4L2 diborane(4) bis-adducts, certain more sterically demanding carbene ligands induce a halide displacement which led to the first halide-bridged monocationic diboron species, [B2X3L2]A (A = BCl4, Br, I). Furthermore, low-temperature 1:1 reactions of B2Cl4 with sterically demanding N-heterocyclic carbenes led to the formation of kinetically unstable mono-adducts, one of which was structurally characterized. A comparison of the NMR spectra and structural data of new and literature-known bis-adducts shows several trends pertaining to the nature of the halides and the stereoelectronic properties of the Lewis bases employed.
There are many compounds similar to this compound(141556-42-5)Formula: C21H24N2. if you want to know more, you can check out my other articles. I hope it will help you，maybe you’ll find some useful information.
Reference:
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