14/9/2021 News Discovery of cis-Cyclohexane-1,2-diamine

Electric Literature of 1436-59-5. Let’s face it, organic chemistry can seem difficult to learn. Especially from a beginner’s point of view. Like 1436-59-5, Name is cis-Cyclohexane-1,2-diamine. In a document type is Article, introducing its new discovery.

A method of molecular design of self-assembling metal complexes has been established.The copper(II) complex with a quadridentate ligand ClO4 undergoes deprotonation of the imidazole proton under basic conditions to give an imidazolate-bridged polymeric compound <(CuL2)infinite>, where H2L2 = N-3-ethoxysalicylidene-N’-imidazol-4-ylmethylenecyclohexane-1,2-diamine.The latter compound crystallizes in the monoclinic space group P21/a with a = 15.515(5), b = 9.338(5), c = 12.660(2) Angstroem, beta = 95.33(2) deg, and Z = 4, R = 0.078 for 1721 reflections.It has an infinite zigzag-chain structure and the variable-temperature magnetic data are well reproduced using the Ising model based on H = -2SigmaJijSiSj with a J value of -1.8 cm-1.The complex ClO4 with a tridentate ligand gives an imidazolate-bridged tetranuclear complex <(CuL3)4>4 on deprotonation at the imidazole nitrogen, where HL3 = N-imidazol-4-ylmethylene-N’,N’-dimethylpropane-1,3-diamine.The latter compound crystallizes in the triclinic space group P<*> with a = 15.216(6), b = 15.592(5), c = 15.102(5) Angstroem, alpha = 104.98(3) deg, beta = 108.44(3) deg, gamma = 61.12(2) deg, Z = 2, and R = 0.096 for 6931 reflections.The structure consists of a cyclic tetranuclear molecule in which each imidazolate nitrogen atom co-ordinates axially to the copper(II) ion of the adjacent unit.Variable-temperature magnetic data are well reproduced using the Heisenberg model based on H = -2J(S1*S2 + S2*S3 + S3*S4 + S4*S1) with J = -60.0 cm-1.

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Reference：
Chiral Catalysts,
Chiral catalysts – SlideShare