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[(n-C_4H_9)_3SnO_2C(CH_2)_2CO_2Sn(C_4H_9-n)_3]: A Novel Three-dimensional Framework Structure of Organotin Complex 被引量:2
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作者 尹汉东 王传华 +2 位作者 马春林 王勇 房海霞 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2003年第4期387-390,共4页
The bis(tributyltin) ester of succinic acid was synthesized by the reaction of disodium salt of succinic acid with tributyltin chloride in a molar ratio of 1:2. The crystal structure was determined by X-ray single-cry... The bis(tributyltin) ester of succinic acid was synthesized by the reaction of disodium salt of succinic acid with tributyltin chloride in a molar ratio of 1:2. The crystal structure was determined by X-ray single-crystal diffraction. It belongs to orthorhombic with space group Pccn, a = 20.949(3), b = 17.470(3), c = 20.345(3) Angstrom, V = 7446(2) Angstrom(3), Z = 8, D-c = 1.242 g/cm(3), mu = 1.365 mm(-1), F(000) = 2864, R = 0.0544 and wR = 0.1417. The tin atom is of five-coordination in a trigonal bipyramidal structure by bridging two carboxylate groups in different directions and the resulting structure which contains straight twist large ring channels along the axes of a, b and c is a three-dimensional framework polymer containing two different tin atoms. 展开更多
关键词 TRIBUTYLTIn glutaric acid crystal structure three-dimensional framework structure
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程度义“有N”结构的实证研究 被引量:2
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作者 李静波 《语言教学与研究》 CSSCI 北大核心 2020年第3期91-101,共11页
本文核查了语料库中近8万条例句,采用构式搭配分析法考察了"有N"结构中准入词与动词"有"、准入词与形容词的搭配强度。研究发现,表事件属性的准入词与"有"搭配强度极高,表人属性的与"有"搭配... 本文核查了语料库中近8万条例句,采用构式搭配分析法考察了"有N"结构中准入词与动词"有"、准入词与形容词的搭配强度。研究发现,表事件属性的准入词与"有"搭配强度极高,表人属性的与"有"搭配强度较低;准入词的强描述性语义成分集中在"大、高(深)、强、多(足)、好"等语义上,而非准入词与这些形容词搭配关系不强,甚至多为排斥关系。"有N"结构的"量大、程度高"义是准入词的强描述性语义成分的显现。 展开更多
关键词 “有n”结构 准入词 描述性语义特征 搭配强度
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