Cobalt coordination polymers of flexible bis(pyridine)-type ligands containing an intervening cyclohexyl group: [Co(L1)1.5(NO3)2], [Co(L2)1.5(NO3)2], [Co(L1′H2)2(NO3)](NO3)5(CH3OH), and [Co(L2′H2)(NO3)2(OCH3)2] {(n-py)CHNC6H10NCH(n-py) [n=3 (L1) or 4 (L2)]; (m-py)CH2NHC6H10NHCH2(m-py) [m=3 (L1′) or 4 (L2′)]}

Crystal structure of N,N′-bis(pyridin-4-ylmethyl)cyclohexane-1,4-diammonium dichloride dihydrate

“…The distance between the two terminal pyridine nitrogen atoms in the dication is 15.864 (2) Å . This is slightly shorter than the NÁ Á ÁN separation [15.970 (3) Å ] in the dication ligand of a one-dimensional zigzag-like Co II coordination polymer built up from alternate Co II ions and the dication of the title salt (Lee & Lee, 2010).…”

A Manganese Coordination Polymer and a Palladium Molecular Compound of 3-Pyridinepropionic acid (HL): [MnL2(H2O)2]∞and trans-[Pd(HL)2Cl2]

“…[11][12][13] Our research group continually reported several linking ligands containing pyridyl-pyridyl, pyridyl-amine, furan-furan, or thiophenethiophene terminals and their coordination polymers. [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31] Recently, several asymmetric linking ligands, in terms of different terminal groups such as carboxylate and pyridyl or imidazole, were utilized to create intriguing coordination polymers, especially those containing both dand f-block metals within their frameworks. [32][33][34][35][36][37][38][39][40] Consistent with the HSAB (hard-soft acid-base) concept, the relatively softer N-terminal is coordinated to the d-block metal, and the relatively harder O-terminal is bound to the f-block metal in such polymers.…”