01587nas a2200181   4500008004100000022001400041245010900055210006900164260000800233300001600241490000700257520093700264100001701201700001901218700001901237700001901256856013001275       2022                        eng d  a0020-166900aSix-membered saturated NHC-stabilized borenium cations: isolation of a cationic analogue of borinic acid0 aSixmembered saturated NHCstabilized borenium cations isolation o  cAUG  a12991-129970 v613 a<p>
	The reaction of six-membered saturated NHC [1,3-di(2,6-diisopropylphenyl) tetrahydropyrimidine-2-ylidene; henceforth abbreviated as 6-SIDipp] with PhBCl2 yields a Lewis base adduct, 6-SIDipp.PhBCl2 (1), which readily undergoes nucleophilic substitution reaction with AgNO3, leading to the single (2) and double (3) substitution of both chlorides with ONO2 moieties at the boron atom. The reaction of 1 with 1 equiv of AlCl3 resulted in a borenium cation of composition [6-SIDipp.B(Ph)Cl]+ (4) with AlCl4- as the counteranion. Although borenium cations with different substituents on boron have been reported, a structurally characterized phenylchloroborenium cation remains unknown. Similarly, the reaction of 1 with triflic acid provides the first representative of a new class of borenium cations bearing one hydroxyl and one phenyl group on boron (5), a cationic analogue of borinic acid. Ph-BN H Diphenylborinic acid</p>
1 aKundu, Gargi1 aBalayan, Kajal1 aTothadi, Srinu1 aSen, Sakya, S.  uhttps://library.ncl.res.in/content/six-membered-saturated-nhc-stabilized-borenium-cations-isolation-cationic-analogue-borinic