%0 Journal Article
%T Threefold Spiral Structure Constructed by 1D Chains of [[M(NCS)2(bpa)2]，biphenyl]n (M = Fe, Co; bpa = 1,2-bis(4-pyridyl)ethane)
%J Crystals | An Open Access Journal from MDPI
%D 2019
%R https://doi.org/10.3390/cryst9020097
%X Assembled complexes [[M(NCS) 2(bpa) 2]，biphenyl] n (M = Fe, Co; bpa = 1,2-bis(4-pyridyl)ethane) have been synthesized because [Fe(NCBH 3) 2(bpa) 2，biphenyl] n has a novel threefold spiral structure and shows stepwise spin-crossover phenomenon. We attempted to obtain spiral structures for [[Fe(NCS) 2(bpa) 2]，biphenyl] n and [[Co(NCS) 2(bpa) 2]，biphenyl] n using a one-step diffusion method, while the reported spiral structure of [[Fe(NCBH 3) 2(bpa) 2]，biphenyl] n was obtained by diffusion method after synthesizing Fe(II)-pyridine complex. X-ray structural analysis revealed that [[Fe(NCS) 2(bpa) 2]，biphenyl] n and [[Co(NCS) 2(bpa) 2]，biphenyl] n had a chiral propeller structure of pyridines around the central metal, and they had a novel spiral structure and chiral space group P3 12 1 without the presence of chiral auxiliaries. It was shown that the host 1D chain, having a chiral propeller structure of pyridines around the central metal along with its concerted interaction with an atropisomer of biphenyl, made a threefold spiral structure. View Full-Tex
%U https://www.mdpi.com/2073-4352/9/2/97