1,2-Diphenylethane-1,2-diyl diisonicotinate monohydrate

Abstract

In the novel title compound, C26H20N2O4·H2O, the two phenyl rings make a dihedral angle of 45.3 (1)° with each other, and the dihedral angle between the two pyridyl planes is 69.8 (1)°.

Design of coordination polymers based on combinations of 1,2-diphenylethane-1,2-diyl diisonicotinate with Cu(ii), Zn(ii), Cd(ii) and Co(ii)

“…After three days, crystals of L-Cu(acac) 2 , L-Cu(hfac) 2 , L-ZnCl 2 , L-CdI 2 and L-CoCl 2 , suitable for single-crystal X-ray diffraction analysis were collected, respectively (see experimental part). For all the described compounds, the bond lengths values found in L are in accordance with those previously reported 34 and are not discussed here below.…”

“…The pyridine and the phenyl units of the ligand in both CPs adopt an anti orientation, as already observed for the ligand alone in the solid state, 34 and are roughly perpendicular to each other.…”

“…The four equatorial positions are occupied by four oxygen atoms (from the two acacor hfacanions) and two nitrogen atoms from pyridine moieties, occupied the two axial positions, as shown in figure 1. As shown in Table 2, the Cu-O or Cu-N bond lengths values are usual for Cu(II) cations ranging from 1.93 to 2.48 Å in L-Cu(acac) 2 and from 1.99 to 2.26 Å in L-Cu(hfac) 2 (Table 2) The pyridine and the phenyl units of the ligand in both CPs adopt an anti orientation, as already observed for the ligand alone in the solid state, 34 and are roughly perpendicular to each other.…”

“…Another example of ligand belonging to this family is 1,2-diphenylethane-1,2-diyl diisonicotinate, with ester junctions, ( L , Scheme 1), for which only its crystalline structure in the solid state has been reported. 34 L is a synthetic ditopic ligand composed of two phenyl and two pyridine moieties, that, to the best of our knowledge, has never been described in a coordination polymer. This ditopic ligand possesses a free rotation around the ethylene bond, which could enable different orientations of the pyridine coordinating entities.…”