{CoII/III5} horseshoe and {NiII4} lacunary cubane coordination clusters: the isobutyrate/N-butyldiethanolamine reaction system
作者:Sebastian Schmitz、Kirill Yu. Monakhov、Jan van Leusen、Natalya V. Izarova、Volkmar Heß、Paul Kögerler
DOI:10.1039/c6ra19232g
日期:——
Co(III) ions, compound 2 presents a tetrahedrally-shaped Ni(II) structural motif where four nickel centers are bridged by three O atoms to afford a lacunary Ni4O3 cubane, a motif hitherto only observed as a substructure of higher-nuclearity coordination clusters and polyoxometalates. Both compounds are thermally surprisingly stable (>130 °C). 1 exhibits weak antiferromagnetic exchange interactions; 2 shows
多核配位化合物[Co II 3 Co III 2(Hbda)2(bda)2(ib)6 ]·2MeCN(1)和[Ni II 4(Hbda)3(ib)5(MeCN)](2)( H 2 bda = N-丁基二乙醇胺,ib =异丁酸酯)是在有氧条件下使用相同的合成方案制备的,只是所用过渡金属(Co II 与Ni II)不同。而化合物1显示出具有交替的Co(II)和Co(III)离子的混合价,五核,马蹄形结构,化合物2呈现四面体形Ni(II)结构基序,其中四个镍中心被三个O原子桥接,得到Ni 4 O 3凹腔,迄今仅作为高核配位簇和多金属氧酸盐的子结构观察到的基序。两种化合物都具有惊人的热稳定性(> 130°C)。1表现出弱的反铁磁交换相互作用;图2示出了三个Ni中心的铁磁耦合三角形,其与单个Ni顶点反铁磁性地相互作用。
Metal Pyridine Complex Salts. VI. Cobaltous and Nickelous Dipyridine Salts of Fatty Acids
Structural insights into the usage of carboxylate ions as molecular pins
作者:Marcin Swiatkowski、Rafal Kruszynski
DOI:10.1016/j.poly.2017.07.011
日期:2017.10
been discussed and correlated with molecularstructures of the studied compounds. Due to placement of carboxylate anions out of coordination moieties, the presented compounds can be ideal standards in spectroscopic determinations of coordination type of butyr and ibutyr ions in coordination compounds. The thermal analyses of the studied compounds revealed the possibility of formation of dihydrate forms