Recent developments in the chemistry of 1,3,2-diazaborolines-(2,3-dihydro-1H-1,3,2-diazaboroles)

Boryl Anion Attacks Transition‐Metal Chlorides To Form Boryl Complexes: Syntheses, Spectroscopic, and Structural Studies on Group 11 Borylmetal Complexes

“…[11] Steric and electronic properties of NHCs can be easily tuned by modification of their substituents and skeleton. [15] The THF solution of 2 b was quenched with Et 3 NHCl to give the corresponding hydroborane 3 b, which could be characterized by X-ray crystallography (see the Supporting Information) in 88 % yield of isolated product from 1 b. [13] Therefore, we decided to synthesize the CÀC-saturated boryllithium compound 2 b to compare its electronic properties with 2 a.…”

“…[9] Reduction of bromoborane precursor 1 b with an excess of lithium powder and a catalytic amount of naphthalene in THF caused the appearance of a broad singlet in the 11 B NMR spectrum at d B = 51.9 ppm (h 1/2 = 773 Hz) attributable to 2 b. [15] The THF solution of 2 b was quenched with Et 3 NHCl to give the corresponding hydroborane 3 b, which could be characterized by X-ray crystallography (see the Supporting Information) in 88 % yield of isolated product from 1 b. [15] The THF solution of 2 b was quenched with Et 3 NHCl to give the corresponding hydroborane 3 b, which could be characterized by X-ray crystallography (see the Supporting Information) in 88 % yield of isolated product from 1 b.…”

“…The downfield shift of the 11 B signal of 2 b relative to that of 2 a (d B = 45.4 ppm) [9] obeyed the trend observed for other diazaborolidine derivatives. [15] The THF solution of 2 b was quenched with Et 3 NHCl to give the corresponding hydroborane 3 b, which could be characterized by X-ray crystallography (see the Supporting Information) in 88 % yield of isolated product from 1 b. Compound 2 b was also characterized by 1 H and 13 C NMR spectroscopy of the reaction mixture in [D 8 ]THF.IMes borylmetal complexes 4 a,b-6 a,b (IMes = N,N'bis(2,4,6-trimethylphenyl)-imidazole-2-ylidene; a denotes unsaturated backbone, b denotes saturated backbone) and PPh 3 -borylgold(I) complexes 7 a,b were synthesized through addition of boryllithium compounds 2 a,b to equal amounts of IMes-or PPh 3 -ligated Group 11 metal chlorides in THF Scheme 1.…”

NBN‐Doped Conjugated Polycyclic Aromatic Hydrocarbons as an AIEgen Class for Extremely Sensitive Detection of Explosives

“…Polycyclic aromatic hydrocarbons with as ix-membered NBN ring are an ew class of aggregation-induced emissive luminogens.E xtremely sensitive detection of ppb levels of TNT by phenyl naphthodiazaborinine is straightforward. [4] Although considerable progress has been made in boron-nitrogen doped p-systems,t he currently available preparative methods suffer from the need for rigorous reaction conditions including the requirement for conditions which are air-and/or moisture-free,multiple steps and unsatisfactory total yield. [1] Them olecular design of boronnitrogen-doped PA Hs therefore expands the structure and functionality library of p-systems,and such chemistry is highly desirable in the development of useful materials.…”

“…[1] Them olecular design of boronnitrogen-doped PA Hs therefore expands the structure and functionality library of p-systems,and such chemistry is highly desirable in the development of useful materials. [4] Although considerable progress has been made in boron-nitrogen doped p-systems,t he currently available preparative methods suffer from the need for rigorous reaction conditions including the requirement for conditions which are air-and/or moisture-free,multiple steps and unsatisfactory total yield. [4] Although considerable progress has been made in boron-nitrogen doped p-systems,t he currently available preparative methods suffer from the need for rigorous reaction conditions including the requirement for conditions which are air-and/or moisture-free,multiple steps and unsatisfactory total yield.…”