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A Zwitterionic Tetrastanna(II) Cyclic Crown by Padmini Sahoo; Purva Chibde; Satyabrata Das; Subhrashis Banerjee; Bhupendra P. Mali; Kumar Vanka; Rajesh G. Gonnade; Cem. B. Yildiz; Moumita Majumdar is a Chemistry article available to read on EtoBox.
What is A Zwitterionic Tetrastanna(II) Cyclic Crown about?
## Abstract A 12‐membered zwitterionic tetrastanna(II) cycle 1 having a crown ether‐like topology has been isolated from the deprotonation of 1,1′‐methylenediimidazole (B) with two equivalents of Sn[N(SiMe~3~)~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(SiMe~3~)~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(SiMe~3~)~2~. Compound 2 exists as a dimer, where the unsubstituted ring nitrogen atom coordinated intermolecularly to the other stannylene center.
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- Author
- Padmini Sahoo; Purva Chibde; Satyabrata Das; Subhrashis Banerjee; Bhupendra P. Mali; Kumar Vanka; Rajesh G. Gonnade; Cem. B. Yildiz; Moumita Majumdar
- Publisher
- Wiley
- Published
- 2023
- Language
- EN
- Field
- Chemistry (Physical Sciences)