联吡啶四氮唑单核钆(Ⅲ)配合物的甲基化影响 |
Effect of the Methylation on Mononuclear Gd(Ⅲ) Bipyridyl Tetrazolate Complexes |
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摘要: 应用6-(氢-5-四氮唑基)-2,2'-联吡啶(tbpyH)和6-(氢-5-四氮唑基)-4,4'-二甲基-2,2'-联吡啶(tmbpyH)配体,合成得到2个新的单核钆(Ⅲ)配合物[Gd(tbpy)2(DMF)(H2O)2]NO3·2H2O (1)和[Gd(tmbpy)2(DMF)(NO3)]·DMF·THF(2)。X射线单晶衍射表明,每个钆(Ⅲ)离子均表现为1个畸变的三冠三角棱柱体,包含了2个四氮唑基N-H去质子化而产生的一价阴离子三齿螯合配体。此外,在2,2'-联吡啶环上引入2个甲基对钆(Ⅲ)金属中心的配位环境有显著影响,表现为2个单齿配位的水分子被1个螯合配位的硝酸根离子取代。 |
关键词: 钆(Ⅲ)配合物 联吡啶四氮唑 甲基化 晶体结构 |
基金项目: 国家自然科学基金(No.21561013,21501077)、江西省青年科学基金重大项目(No.20143ACB21017,20161ACB21013)、江西省自然科学基金(No.20142BAB203001,20151BAB213003)和江西理工大学清江青年英才支持计划资助。 |
Abstract: Two new mononuclear Gd (Ⅲ)complexes,[Gd (tbpy)2 (DMF) (H2O)2]NO3·2H2O (1)and[Gd (tmbpy)2 (DMF) (NO3)]·DMF·THF (2), have been synthesized by using 6-(1H-tetrazole-5-yl)-2,2'-bipyridyle (tbpyH)and 6-(1H-tetrazole-5-yl)-4,4'-dimethyl-2,2'-bipyridyle (tmbpyH). As revealed by single-crystal X-ray diffraction, each Gd (Ⅲ)ion has a distorted tricapped trigonal prism with two mono-anionic tridentate chelating ligands, originating from N-H deprotonation of the tetrazolyl ring, and the introduction of two methyl groups into the 2,2'-bypridyl ring has a significant effect on the coordination environment of the Gd (Ⅲ)core, showing that two mono-coordinated H2O molecules are displaced by one chelating nitrate. CCDC:1496645, 1; 1496646, 2. |
Keywords: Gd(Ⅲ) complex bipyridyl tetrazole methylation crystal structure |
投稿时间:2016-08-08 修订日期:2016-12-07 |
摘要点击次数: 1814 |
全文下载次数: 1870 |
狄宝生,罗燕生,曾雪花,何丽华,陈景林,廖金生,刘遂军,温和瑞.联吡啶四氮唑单核钆(Ⅲ)配合物的甲基化影响[J].无机化学学报,2017,33(2):323-328. |
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