@article {46425,
	title = {Saturated N-heterocyclic carbene based thiele{\textquoteright}s hydrocarbon with a tetrafluorophenylene linker},
	journal = {Chemistry-A European Journal},
	year = {2019},
	month = {NOV},
	type = {Article; Early Access},
	abstract = {<p>The synthesis of a SIPr [1,3-bis(2,6-diisopropylphenyl)-imidazolin-2-ylidene] derived Kekule diradicaloid with a tetrafluorophenylene spacer (3) has been described. Two synthetic routes have been reported to access 3. The cleavage of C-F bond of C6F6 by SIPr in the presence of BF3 led to double C-F activated compound with two tetrafluoro borate counter anions (2), which upon reduction by lithium metal afforded 3. Alternatively, 3 can be directly accessed in one step by reacting SIPr with C6F6 in presence of Mg metal. Compounds 2 and 3 were well characterized spectroscopically and by single-crystal X-ray diffraction studies. Experimental and computational studies support the cumulenic closed-shell singlet state of 3 with a singlet-triplet energy gap (Delta ES-T) of 23.7 kcal mol(-1).</p>
},
	keywords = {C-F activation, Density functional calculations, fluorine, Kekule diradicaloids, saturated NHC},
	issn = {0947-6539},
	doi = {10.1002/chem.201904421},
	author = {Kundu, Gargi and De, Sriman and Tothadi, Srinu and Das, Abhishek and Koley, Debasis and Sen, Sakya S.}
}
@article {48142,
	title = {Nucleophilic substitution at a coordinatively saturated five-membered NHC center dot haloborane centre},
	journal = {Inorganics},
	volume = {10},
	year = {2022},
	month = {JUL},
	pages = {97},
	type = {Article},
	abstract = {<p>
	In this paper, we have used a saturated five-membered N-Heterocyclic carbene (5SIDipp = 1,3-bis-(2,6-diisopropylphenyl)imidazolin-2-ylidine) for the synthesis of SNHC-haloboranes adducts and their further nucleophilic substitutions to put unusual functional groups at the central boron atom. The reaction of 5-SIDipp with RBCl2 yields Lewis-base adducts, 5-SIDipp center dot RBCl2 [R = H (1), Ph (2)]. The hydrolysis of 1 gives the NHC stabilized boric acid, 5-SIDipp center dot B(OH)(3) (3), selectively. Replacement of chlorine atoms from 1 and 2 with one equivalent of AgOTf led to the formation of 5-SIDipp center dot HBCl(OTf) (4) and 5-SIDipp center dot PhBCl(OTf) (5a), where all the substituents on the boron atoms are different. The addition of two equivalents of AgNO3 to 2 leads to the formation of rare di-nitro substituted 5-SIDipp center dot BPh(NO3)(2) (6). Further, the reaction of 5-SIDipp with B(C6F5)(3) in tetrahydrofuran and diethyl ether shows a frustrated Lewis pair type small molecule activated products, 7 and 8.</p>
},
	keywords = {NHC-haloboranes, nucleophilic substitution, saturated NHC, tetra-coordinate boron},
	doi = {10.3390/inorganics10070097},
	author = {Kundu, Gargi and Tothadi, Srinu and Sen, Sakya S.}
}
