Zwitterionic base-stabilized digermadistannacyclobutadiene and tetragermacyclobutadiene
The syntheses of a zwitterionic base-stabilized digermadistannacyclobutadiene and tetragermacyclobutadiene supported by amidinates and low-valent germanium amidinate substituents are described. The reaction of the amidinate GeI dimer, [LGe:]2 (1, L=PhC(NtBu)2), with two equivalents of the amidinate...
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sg-ntu-dr.10356-1027142020-03-07T12:34:54Z Zwitterionic base-stabilized digermadistannacyclobutadiene and tetragermacyclobutadiene Yeong, Hui-Xian Xi, Hong-Wei Li, Yongxin Kunnappilly, Sophy Bhasi Chen, Bozhen Lau, Kai-Chung Hirao, Hajime Lim, Kok Hwa So, Cheuk-Wai School of Chemical and Biomedical Engineering School of Physical and Mathematical Sciences DRNTU::Science::Chemistry::Biochemistry The syntheses of a zwitterionic base-stabilized digermadistannacyclobutadiene and tetragermacyclobutadiene supported by amidinates and low-valent germanium amidinate substituents are described. The reaction of the amidinate GeI dimer, [LGe:]2 (1, L=PhC(NtBu)2), with two equivalents of the amidinate tin(II) chloride, [LSnCl] (2), and KC8 in tetrahydrofuran (THF) at room temperature afforded a mixture of the zwitterionic base-stabilized digermadistannacyclobutadiene, [L2Ge2Sn2L′2] (3; L′=LGe:), and the bis(amidinate) tin(II) compound, [L2Sn:] (4). Compound 3 can also be prepared by the reaction of 1 with [LArSnCl] (5, LAr=tBuC(NAr)2, Ar=2,6-iPr2C6H3) in THF at room temperature. Moreover, the reaction of 1 with the “onio-substituent transfer” reagent [4-NMe2-C5H4NSiMe3]OTf (8) in THF and 4-(N,N-dimethylamino)pyridine (DMAP) at room temperature afforded a mixture of the zwitterionic base-stabilized tetragermacyclobutadiene, [L4Ge6] (9), the amidinium triflate, [PhC(NHtBu)2]OTf (10), and Me3SiSiMe3 (11). X-ray structural data and theoretical studies show conclusively that compounds 3 and 9 have a planar and rhombic charge-separated structure. They are also nonaromatic. 2014-04-02T06:27:31Z 2019-12-06T20:59:30Z 2014-04-02T06:27:31Z 2019-12-06T20:59:30Z 2013 2013 Journal Article Yeong, H.-X., Xi, H.-W., Li, Y., Kunnappilly, S. B., Chen, B., Lau, K.-C., et al. (2013). Zwitterionic Base-Stabilized Digermadistannacyclobutadiene and Tetragermacyclobutadiene. Chemistry - A European Journal, 19(43), 14726-14731. 0947-6539 https://hdl.handle.net/10356/102714 http://hdl.handle.net/10220/19077 10.1002/chem.201300447 en Chemistry - a European journal © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. |
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DRNTU::Science::Chemistry::Biochemistry Yeong, Hui-Xian Xi, Hong-Wei Li, Yongxin Kunnappilly, Sophy Bhasi Chen, Bozhen Lau, Kai-Chung Hirao, Hajime Lim, Kok Hwa So, Cheuk-Wai Zwitterionic base-stabilized digermadistannacyclobutadiene and tetragermacyclobutadiene |
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The syntheses of a zwitterionic base-stabilized digermadistannacyclobutadiene and tetragermacyclobutadiene supported by amidinates and low-valent germanium amidinate substituents are described. The reaction of the amidinate GeI dimer, [LGe:]2 (1, L=PhC(NtBu)2), with two equivalents of the amidinate tin(II) chloride, [LSnCl] (2), and KC8 in tetrahydrofuran (THF) at room temperature afforded a mixture of the zwitterionic base-stabilized digermadistannacyclobutadiene, [L2Ge2Sn2L′2] (3; L′=LGe:), and the bis(amidinate) tin(II) compound, [L2Sn:] (4). Compound 3 can also be prepared by the reaction of 1 with [LArSnCl] (5, LAr=tBuC(NAr)2, Ar=2,6-iPr2C6H3) in THF at room temperature. Moreover, the reaction of 1 with the “onio-substituent transfer” reagent [4-NMe2-C5H4NSiMe3]OTf (8) in THF and 4-(N,N-dimethylamino)pyridine (DMAP) at room temperature afforded a mixture of the zwitterionic base-stabilized tetragermacyclobutadiene, [L4Ge6] (9), the amidinium triflate, [PhC(NHtBu)2]OTf (10), and Me3SiSiMe3 (11). X-ray structural data and theoretical studies show conclusively that compounds 3 and 9 have a planar and rhombic charge-separated structure. They are also nonaromatic. |
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School of Chemical and Biomedical Engineering |
author_facet |
School of Chemical and Biomedical Engineering Yeong, Hui-Xian Xi, Hong-Wei Li, Yongxin Kunnappilly, Sophy Bhasi Chen, Bozhen Lau, Kai-Chung Hirao, Hajime Lim, Kok Hwa So, Cheuk-Wai |
format |
Article |
author |
Yeong, Hui-Xian Xi, Hong-Wei Li, Yongxin Kunnappilly, Sophy Bhasi Chen, Bozhen Lau, Kai-Chung Hirao, Hajime Lim, Kok Hwa So, Cheuk-Wai |
author_sort |
Yeong, Hui-Xian |
title |
Zwitterionic base-stabilized digermadistannacyclobutadiene and tetragermacyclobutadiene |
title_short |
Zwitterionic base-stabilized digermadistannacyclobutadiene and tetragermacyclobutadiene |
title_full |
Zwitterionic base-stabilized digermadistannacyclobutadiene and tetragermacyclobutadiene |
title_fullStr |
Zwitterionic base-stabilized digermadistannacyclobutadiene and tetragermacyclobutadiene |
title_full_unstemmed |
Zwitterionic base-stabilized digermadistannacyclobutadiene and tetragermacyclobutadiene |
title_sort |
zwitterionic base-stabilized digermadistannacyclobutadiene and tetragermacyclobutadiene |
publishDate |
2014 |
url |
https://hdl.handle.net/10356/102714 http://hdl.handle.net/10220/19077 |
_version_ |
1681043204313448448 |