title: Reversible Stannylenoid Formation from the Corresponding Stannylene and Cesium Fluoride.
abstract: A fluorostannylenoid (Cs+[R2SnF]-(9), R2=(TMS)2CCH2CH2C(TMS)2) was prepared by reacting a stable dialkylstannylene (R2Sn (8), R2=(TMS)2CCH2CH2C(TMS)2) with cesium fluoride at room temperature in THF. While 9 is stable in THF and DME, removal of the solvent leads to the regeneration of stannylene 8. No reaction occurred when 8 was treated with CsF in a hydrocarbon solvent. Addition of dibenzo-21-crown-7 ether to the THF solution of stannylenoid 9 followed by usual workup affords the corresponding crystalline stannylenoid crown ether complex, the X-ray structural analysis of which revealed a fluorine-bridged contact ion-pair structure. The reaction of 9 with excess phenylacetylene gives the corresponding di(phenylethynyl)stannane.
authors.affiliation: Hangzhou Normal University, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, No. 58 Haishu Rd. Hangzhou, 311121, Zhejiang, China.
authors.forename: Chenting
authors.initials: C
authors.lastname: Yan
authors.affiliation: Hangzhou Normal University, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, No. 58 Haishu Rd. Hangzhou, 311121, Zhejiang, China.
authors.forename: Zhifang
authors.initials: Z
authors.lastname: Li
authors.affiliation: Hangzhou Normal University, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, No. 58 Haishu Rd. Hangzhou, 311121, Zhejiang, China.
authors.forename: Xu-Qiong
authors.initials: XQ
authors.lastname: Xiao
authors.affiliation: Hangzhou Normal University, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, No. 58 Haishu Rd. Hangzhou, 311121, Zhejiang, China.
authors.forename: Ningka
authors.initials: N
authors.lastname: Wei
authors.affiliation: Hangzhou Normal University, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, No. 58 Haishu Rd. Hangzhou, 311121, Zhejiang, China.
authors.forename: Qiong
authors.initials: Q
authors.lastname: Lu
authors.affiliation: Hangzhou Normal University, Key Laboratory of Organosilicon Chemistry and Material Technology of Ministry of Education, No. 58 Haishu Rd. Hangzhou, 311121, Zhejiang, China.
authors.forename: Mitsuo
authors.initials: M
authors.lastname: Kira
keywords: DFT calculations; fluorostannylenoids; main-group compounds; stannylenes; tin