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http://dx.doi.org/10.5012/bkcs.2009.30.4.846

Synthesis and Structure Analysis of α and β Forms of [12] Metallacrown-6 Nickel(II) Complex: [Ni6(SCH2CH2CH3)12]  

Xiao, Hai Lian (College of Materials Science and Engineering, Qingdao University of Science and Technology)
Jian, Fang Fang (New Materials & Function Coordination Chemistry Laboratory, Qingdao University of Science and Technology)
Zhang, Ke Jie (Nanjing University of Science and Technology)
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Abstract
Two modifications of the ${\alpha}\;and\;{\beta}$ forms of propyl mercaptan nickel(II) cluster, [$Ni_6(SCH_2CH_2CH_3)_{12}$], have been synthesized and their crystal structures have been determined by single-crystal X-ray diffraction. The alkyl groups are away from $Ni_6$ ring in $\alpha$ form whereas they are near to the Ni atom in $\beta$ form. The distance of Ni-H in $\beta$ form [2.576(5) $\AA$] is much shorter than that in $\alpha$ form [3.101(2) $\AA$]. In the crystal lattice of $\beta$ form, the whole structure forms a flower shape.
Keywords
Polymorphism; Nickel cluster compounds; Crown compounds; Crystal structure;
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