@article {49139,
	title = {Zwitterionic tetrastanna(II) cyclic crown},
	journal = {European Journal of Inorganic  Chemistry},
	volume = {26},
	year = {2023},
	month = {OCT },
	type = {Article},
	abstract = {<p>
	A 12-membered zwitterionic tetrastanna(II) cycle 1 having a crown ether-like topology has been isolated from the deprotonation of 1,1 \&amp; PRIME;-methylenediimidazole (B) with two equivalents of Sn[N(SiMe3)(2)](2) (A). The solid-state structure and NMR analysis confirms the tetrastanna(II) cycle 1 to be comprised of two stannate(II) and two stannyliumylidene ion pairs in alternating positions of the heterocycle. Computational analysis shows greater nucleophilicity at the proximally located stannate(II) centers. Nonetheless, the tetrastanna(II) cycle 1 remains poorly reactive due to engagement of Sn-II lone pair electrons in intramolecular donor-acceptor interactions. Simple deprotonation reaction between Sn[N(SiMe3)(2)](2) (A) and N-(diisopropylphenyl)imidazole (C) in equimolar ratio has led to a stannylene 2, involving the formation of a Sn-C covalent bond with the anionic imidazol-2-yl carbon center along with the release of NH(SiMe3)(2). Compound 2 exists as a dimer, where the unsubstituted ring nitrogen atom coordinated intermolecularly to the other stannylene center.</p>
},
	keywords = {Deprotonation, Imidazole, Macrocycle, Sn-II cation, stannylene},
	issn = {1434-1948},
	doi = {10.1002/ejic.202300249},
	author = {Sahoo, Padmini and Chibde, Purva and Das, Satyabrata and Banerjee, Subhrashis and Mali, Bhupendra P. and Vanka, Kumar and Gonnade, Rajesh G. and Yildiz, Cem. B. and Majumdar, Moumita}
}
