Proton-Induced Cis-Trans Conversion of a Platinum(II) Center Coordinated by L-Cysteinatocobalt(III) Metalloligands
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- 作者：Zentaro Matsumoto ; Takashi Aridomi ; Asako Igashira-Kamiyama ; Tatsuya Kawamoto ; Takumi Konno
- 刊名：Inorganic Chemistry
- 出版年：2007
- 出版时间：April 16, 2007
- 年：2007
- 卷：46
- 期：8
- 页码：2968 - 2970
- 全文大小：117K
- 年卷期：v.46,no.8(April 16, 2007)
- ISSN：1520-510X
文摘
Treatment of 
L-[Co(L-cys-N,S)(en)2]+ (L-H2cys = L-cysteine) with[PtCl4]2- in water, followed by the addition of acid, gave anS-bridged CoIII2PtII trinuclear complex ([1]4+), which was reversiblyconverted to its deprotonated complex ([2]2+) in an aqueoussolution. While [1]4+ formed only a trans isomer, [2]2+ existed asa mixture of trans and cis isomers. The selective formation of acis isomer was achieved by treatment of [1]4+ or [2]2+ with phthalicacid in water, which afforded a unique CoIII4PtII2 hexanuclearcomplex ([3]4+). Complex [3]4+ was reverted back to [1]4+ bytreatment with aqueous HCl, accompanied by the complete cis-to-trans conversion.
L-[Co(L-cys-N,S)(en)2]+ (L-H2cys = L-cysteine) with[PtCl4]2- in water, followed by the addition of acid, gave anS-bridged CoIII2PtII trinuclear complex ([1]4+), which was reversiblyconverted to its deprotonated complex ([2]2+) in an aqueoussolution. While [1]4+ formed only a trans isomer, [2]2+ existed asa mixture of trans and cis isomers. The selective formation of acis isomer was achieved by treatment of [1]4+ or [2]2+ with phthalicacid in water, which afforded a unique CoIII4PtII2 hexanuclearcomplex ([3]4+). Complex [3]4+ was reverted back to [1]4+ bytreatment with aqueous HCl, accompanied by the complete cis-to-trans conversion.