THE STRUCTURE OF GOSSYPOL AS A FUNCTION OF THE PRESENCE OF HAUCL4 AND OF BE-2+ IONS

被引：16

作者：

BRZEZINSKI, B ^{[1
]}

PASZYC, S ^{[1
]}

ZUNDEL, G ^{[1
]}

机构：

[1] INST PHYS CHEM,W-8000 MUNICH 2,GERMANY

来源：

JOURNAL OF MOLECULAR STRUCTURE | 1991年 / 246卷 / 1-2期

关键词：

D O I：

10.1016/0022-2860(91)80012-S

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Solutions of gossypol with HAuCl4 and Be (AuCl4)2 have been studied by FT-IR spectroscopy. Addition of HAuCl4 shifts the tautomeric equilibrium of gossypol completely from the aldehyde-aldehyde to the ketol-ketol tautomer. On addition of Be (AuCl)2, 1:1 Be2+ gossypol complexes are formed. With this complexation the tautomeric equilibrium of gossypol is completely shifted from the aldehyde-aldehyde to the lactol-lactol form. An IR continuum in the region 1100-500 cm-1 indicates that the Be2+ ion fluctuates within the gossypol molecule between four O acceptor atoms. A four minima Be2+ potential is present with steep slopes at the acceptor O atoms. The complex shows so-called "Be2+ polarizability" since the Be2+ can easily be shifted within this potential.

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页码：45 / 51

页数：7

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