湖南师范大学自然科学学报
湖南師範大學自然科學學報
호남사범대학자연과학학보
Journal of Natural Science of Hunan Normal University
2015年
5期
53-58
,共6页
缩二脲%钴配合物%表征%热分解
縮二脲%鈷配閤物%錶徵%熱分解
축이뇨%고배합물%표정%열분해
biuret%cobalt complex%characterization%thermal decomposition
在甲醇溶液中,以乙酸钴、氯化钴、硝酸钴和缩二脲为原料合成了3种结构不同的缩二脲钴配合物.通过元素分析、红外光谱、X射线粉末衍射和热分析对产物进行了表征,其化学组成为[Co(bi)2(H2O)2](Ac)2· H2O (1),[Co(bi)2Cl2](2)和[Co(bi)3](NO3)2·2.5H2O (3)(bi =NH2CONHCONH2).配合物1中每个Co2+与2个缩二脲分子中的4个羰基氧原子和2个水分子中的氧原子配位,配合物2中每个Co2+与2个缩二脲分子中的4个羰基氧原子和2个氯原子配位,而配合物3中每个Co2+与6个全部来自缩二脲分子的羰基氧原子配位,均形成了配位数为6的配合物.配合物1和3的热分解过程包括失水和配体的分解,而配合物2的热分解过程只是配体的分解过程,最后完全分解形成氧化钴.
在甲醇溶液中,以乙痠鈷、氯化鈷、硝痠鈷和縮二脲為原料閤成瞭3種結構不同的縮二脲鈷配閤物.通過元素分析、紅外光譜、X射線粉末衍射和熱分析對產物進行瞭錶徵,其化學組成為[Co(bi)2(H2O)2](Ac)2· H2O (1),[Co(bi)2Cl2](2)和[Co(bi)3](NO3)2·2.5H2O (3)(bi =NH2CONHCONH2).配閤物1中每箇Co2+與2箇縮二脲分子中的4箇羰基氧原子和2箇水分子中的氧原子配位,配閤物2中每箇Co2+與2箇縮二脲分子中的4箇羰基氧原子和2箇氯原子配位,而配閤物3中每箇Co2+與6箇全部來自縮二脲分子的羰基氧原子配位,均形成瞭配位數為6的配閤物.配閤物1和3的熱分解過程包括失水和配體的分解,而配閤物2的熱分解過程隻是配體的分解過程,最後完全分解形成氧化鈷.
재갑순용액중,이을산고、록화고、초산고화축이뇨위원료합성료3충결구불동적축이뇨고배합물.통과원소분석、홍외광보、X사선분말연사화열분석대산물진행료표정,기화학조성위[Co(bi)2(H2O)2](Ac)2· H2O (1),[Co(bi)2Cl2](2)화[Co(bi)3](NO3)2·2.5H2O (3)(bi =NH2CONHCONH2).배합물1중매개Co2+여2개축이뇨분자중적4개탄기양원자화2개수분자중적양원자배위,배합물2중매개Co2+여2개축이뇨분자중적4개탄기양원자화2개록원자배위,이배합물3중매개Co2+여6개전부래자축이뇨분자적탄기양원자배위,균형성료배위수위6적배합물.배합물1화3적열분해과정포괄실수화배체적분해,이배합물2적열분해과정지시배체적분해과정,최후완전분해형성양화고.
Three kinds of cobalt complexes of biuret were synthesized with cobalt acetate, cobalt chloride or cobalt nitrate and biuret as starting materials in methanol solution.The complexes were char-acterized by elemental analyses, FTIR spectra, X-ray powder diffraction, and thermogravimetric analysis. The compositions of the complexes were[Co(bi)2(H2O)2](Ac)2· H2O (1),[Co(bi)2Cl2] (2), and [Co(bi)3](NO3)2· 2.5H2O (3) (bi =NH2CONHCONH2).The cobalt ion in complex 1 was coordi-nated by six oxygen atoms from two biuret molecules and two water molecules, the cobalt ion in complex 2 was coordinated by four carbonyl oxygen atoms from two biuret molecules and two chloride atoms, while the cobalt ion in complex 3 was coordinated by six carbonyl oxygen atoms from three biuret molecules. The cobalt ions were all hexa-coordinated.The thermal decomposition processes of complex 1 and 3 under air included dehydration and pyrolysis of the ligands and anions, while the thermal decomposition process of complex 2 was only the pyrolysis of ligands, and the final residues were all cobalt oxide.