Complexation properties and characterization of four conformers of a [2.1.2.1]metacyclophane

Tsuyoshi Sawada; Akihiko Tsuge; Thies Thiemann; Shuntaro Mataka; Masashi Tashiro

doi:10.1007/BF00708989

Complexation properties and characterization of four conformers of a [2.1.2.1]metacyclophane

Tsuyoshi Sawada, Akihiko Tsuge, Thies Thiemann, Shuntaro Mataka, Masashi Tashiro

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

Cone, partial cone, 1,2-alternate, and 1,4-alternate conformers of tetrakis[(ethoxycarbonyl)-methoxy] [2.1.2.1]metacyclophane (MCP, 2) were isolated and characterized by¹H-NMR and an X-ray crystal structure analysis of the 1,4-alternate conformer. Of the four conformers, only the cone conformer 2d forms a complex with alkali metals. The stability constants of 2d with alkali metal ions were determined by the direct¹H-NMR method and UV spectra, and the order observed as potassium ≪cesium, sodium ions.

Original language	English
Pages (from-to)	301-313
Number of pages	13
Journal	Journal of Inclusion Phenomena and Molecular Recognition in Chemistry
Volume	19
Issue number	1-4
DOIs	https://doi.org/10.1007/BF00708989
Publication status	Published - Mar 1994
Externally published	Yes

Keywords

Metacyclophane
calixarenes
conformational isomers
ion-selectivity

ASJC Scopus subject areas

Food Science
General Chemistry
Condensed Matter Physics

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10.1007/BF00708989

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abstract = "Cone, partial cone, 1,2-alternate, and 1,4-alternate conformers of tetrakis[(ethoxycarbonyl)-methoxy] [2.1.2.1]metacyclophane (MCP, 2) were isolated and characterized by1H-NMR and an X-ray crystal structure analysis of the 1,4-alternate conformer. Of the four conformers, only the cone conformer 2d forms a complex with alkali metals. The stability constants of 2d with alkali metal ions were determined by the direct1H-NMR method and UV spectra, and the order observed as potassium ≪cesium, sodium ions.",

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T1 - Complexation properties and characterization of four conformers of a [2.1.2.1]metacyclophane

AU - Sawada, Tsuyoshi

AU - Tsuge, Akihiko

AU - Thiemann, Thies

AU - Mataka, Shuntaro

AU - Tashiro, Masashi

PY - 1994/3

Y1 - 1994/3

N2 - Cone, partial cone, 1,2-alternate, and 1,4-alternate conformers of tetrakis[(ethoxycarbonyl)-methoxy] [2.1.2.1]metacyclophane (MCP, 2) were isolated and characterized by1H-NMR and an X-ray crystal structure analysis of the 1,4-alternate conformer. Of the four conformers, only the cone conformer 2d forms a complex with alkali metals. The stability constants of 2d with alkali metal ions were determined by the direct1H-NMR method and UV spectra, and the order observed as potassium ≪cesium, sodium ions.

AB - Cone, partial cone, 1,2-alternate, and 1,4-alternate conformers of tetrakis[(ethoxycarbonyl)-methoxy] [2.1.2.1]metacyclophane (MCP, 2) were isolated and characterized by1H-NMR and an X-ray crystal structure analysis of the 1,4-alternate conformer. Of the four conformers, only the cone conformer 2d forms a complex with alkali metals. The stability constants of 2d with alkali metal ions were determined by the direct1H-NMR method and UV spectra, and the order observed as potassium ≪cesium, sodium ions.

KW - Metacyclophane

KW - calixarenes

KW - conformational isomers

KW - ion-selectivity

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Complexation properties and characterization of four conformers of a [2.1.2.1]metacyclophane

Abstract

Keywords

ASJC Scopus subject areas

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