Crystal structure of a samarium(III) nitrate chain cross-linked by a bis-carbamoyl-methyl-phosphine oxide ligand.
Crystal structure of a samarium(III) nitrate chain cross-linked by a bis-carbamoyl-methyl-phosphine oxide ligand.
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DOI：
10.1107/s1600536814020078
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发表时间：
2014-10-01
期刊：
影响因子：
--
通讯作者：
Biros SM
中科院分区：
文献类型：
--
作者：
Stoscup JA;Staples RJ;Biros SM
标题化合物的晶体结构由SmIII阳离子和硝酸根阴离子的聚合物链组成，在两个维度上与有机配体交联。在标题化合物聚[aqua bis [（μ-nitrato-κ4 O，O′：O，O′′）tetra-nitrato-κ2 O，O′）{μ4-tetra-ethyl [（ethane-1，2-diyl）bis（aza-nediloxyl）bis [（2-oxo-2，1-diethane-2，1-diethanyl）]di-phospho-pentanate-κ2 O，O′}disamarium（III）]，[Sm 2（NO3）6（C14 H30 N2 O 8 P2）（H2O）]n中，12配位SmIII和9配位SmIII阳离子通过共享的双二齿硝酸根阴离子交替连接成平行于a轴延伸的波纹链。该链的九配位SmIII原子也被双齿的，但灵活的，氨基甲酰基-N-甲基膦氧化物（CMPO）配体螯合，并带有一个水分子。该水分子与12配位SmIII阳离子上的硝酸根基团形成氢键。位于反转中心附近的CMPO配体沿c轴沿着连接相邻链，形成平行于ac平面的片。酰胺NH基团和金属结合的硝酸根阴离子之间的氢键也存在于这些片材中。这些薄片仅通过货车范德华相互作用沿B轴沿着堆积。
The crystal structure of the title compound consists of a polymeric chain of SmIII cations and nitrate anions, cross-linked in two dimensions with an organic ligand. In the title compound poly[aquabis(μ-nitrato-κ4 O,O′:O,O′′)tetrakis(nitrato-κ2 O,O′){μ4-tetraethyl [(ethane-1,2-diyl)bis(azanediyl)bis(2-oxoethane-2,1-diyl)]diphosphonate-κ2 O,O′}disamarium(III)], [Sm2(NO3)6(C14H30N2O8P2)(H2O)]n, a 12-coordinate SmIII and a nine-coordinate SmIII cation are alternately linked via shared bis-bidentate nitrate anions into a corrugated chain extending parallel to the a axis. The nine-coordinate SmIII atom of this chain is also chelated by a bidentate, yet flexible, carbamoylmethylphoshine oxide (CMPO) ligand and bears one water molecule. This water molecule is hydrogen bonded to nitrate groups bonded to the 12-coordinate SmIII cation. The CMPO ligand, which lies about an inversion center, links neighboring chains along the c axis, forming sheets parallel to the ac plane. Hydrogen bonds between the amide NH group and metal-bound nitrate anions are also present in these sheets. The sheets are packed along the b axis through only van der Waals interactions.