Citation:
ZHANG Rong-Hua, ZHAO Dan, LI Fei-Fei, FAN Yun-Chang, LIU Bing-Guo. Structural Determination of a New La(III) Coordination Polymer with Pseudo-merohedral Twinning Structure[J]. Chinese Journal of Structural Chemistry,
2015, 34(6): 938-944.
doi:
10.14102/j.cnki.0254-5861.2011-0624
Structural Determination of a New La(III) Coordination Polymer with Pseudo-merohedral Twinning Structure
摘要:
Hydrothermal reaction of benzene-1,2,4,5-tetracarboxylic (Btec) dianhydride with La2O3 lead to a new organometallic compound, [La2(betc)(Hbtec)(H2O)3][HCONH(CH3)2] (I). Single-crystal X-ray diffraction analysis reveals that it crystallizes in monoclinic space group P21/n that mimics orthorhombic space group Pnma (viz. pseudo-merohedral twinning structure) with a=7.6002(16), b=18.954(4), c=18.213(4) Å, β=90.121(3)°, V=2623.5(9) Å3, Z=4, Mr=907.21, D c=2.297 g/cm3, F(000)=1752, μ(MoKα)=3.32 mm-1, R=0.0575 and wR=0.0956. The structure of I features a 3-D framework constructed by La(III) cations, btec4- ligands, Hbtec3- ligands and coordinated water molecule. All of the La(III) cations are 10-coordinated by O atoms into 1-D infinite chains, which are further interconnected by C atoms of btec ligands to form a 3-D framework.
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关键词:
- organometallic
- / btec
- / pseudo-merohedral twinning
English
Structural Determination of a New La(III) Coordination Polymer with Pseudo-merohedral Twinning Structure
Abstract:
Hydrothermal reaction of benzene-1,2,4,5-tetracarboxylic (Btec) dianhydride with La2O3 lead to a new organometallic compound, [La2(betc)(Hbtec)(H2O)3][HCONH(CH3)2] (I). Single-crystal X-ray diffraction analysis reveals that it crystallizes in monoclinic space group P21/n that mimics orthorhombic space group Pnma (viz. pseudo-merohedral twinning structure) with a=7.6002(16), b=18.954(4), c=18.213(4) Å, β=90.121(3)°, V=2623.5(9) Å3, Z=4, Mr=907.21, D c=2.297 g/cm3, F(000)=1752, μ(MoKα)=3.32 mm-1, R=0.0575 and wR=0.0956. The structure of I features a 3-D framework constructed by La(III) cations, btec4- ligands, Hbtec3- ligands and coordinated water molecule. All of the La(III) cations are 10-coordinated by O atoms into 1-D infinite chains, which are further interconnected by C atoms of btec ligands to form a 3-D framework.
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Key words:
- organometallic
- / btec
- / pseudo-merohedral twinning
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