A hemidirected 1-D coordination polymer [Pb₂(H₂O)₂(HBTC)₂] · 3H₂O extended in holodirected 3-D by weak Pb–O interactions

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• 作者：Jing Shi ; Jun-Wei Ye ; Tian-You Song ; Dao-Jun Zhang ; Kui-Rong Ma ; Jing Ha ; Jia-Ning Xu ; Ping Zhang
• 关键词：Pb(II) ; 1 ; 3 ; 5-Benzenetricarboxylic acid ; Double-chain ; Hemidirected ; Holodirected
• 刊名：Inorganic Chemistry Communications
• 出版年：2007
• 出版时间：December 2007
• 年：2007
• 卷：10
• 期：12
• 页码：1534-1536
• 全文大小：456 K

文摘

A new complex, [Pb₂(H₂O)₂(HBTC)₂] · 3H₂O (H₃BTC = 1,3,5-Benzenetricarboxylic acid) (1), has been synthesized under hydrothermal condition. The single-crystal analysis shows that 1 consists of 1-D double-chains with Pb(II) six-coordinated by three H₃BTC and one H₂O molecule with the Pb–O bond distances in the range of 2.56–2.76 Å. When the Pb–O bonding limit extends from 2.76 to 2.90 Å, the potential weak bonds of Pb–O can be found and the coordination number of Pb will increase from six to nine. As a result, the coordination geometry of Pb(II) transforms from hemidirected to holodirected and an infinite 3-D framework is obtained by the connection of the double-chains. The IR spectrum and the TGA–DTA curve of 1 are also reported in this paper.