Crystal structures and spectroscopic behaviour of polymeric copper(II) chloroacetate adducts with 3- and 4-pyridylmethanol

Polymeric and monomeric dipicolinate complexes with 4-hydroxymethyl pyridine: spectral, structural, thermal and electrochemical characterization

“…The 3-hydroxymethyl pyridine can be used as the bridging ligand for construction of coordination polymers. There are many metal(II) carboxylates with 3-hydroxymethyl pyridine which acts as a bridging ligand between the metal ions [34][35][36]. There is significant difference between the Cu-L [Cu1-O dpc : 2.053(2)-2.066(2); Cu1-N dpc : 1.901(2); Cu1-N 4-hymp : 1.958(2) Å ] bond lengths in the equatorial plane and the Cu-L [Cu1-O aqua : 2.429(2); Cu1-O dpc : 2.434(2) Å ] bond lengths in the axial position and this difference has also been observed in other copper(II) complexes [37][38][39] ( Table 2).…”

catena-Poly[[bis(2-nitrobenzoato-κO)copper(II)]di-μ-3-pyridylmethanol-κ2N,O;κ2O:N]

“…Strong intramolecular hydrogen bonding interactions [O2-H11BÁ Á ÁO3C; O2Á Á ÁO3C = 2.618 (3) Å ] stabilize the structure, forming one-dimensional chains. The structure of (I) can be compared with others with the general formula [CuX 2 (ron) 2 ] n , where X is salicylate (Hoang et al, 1992), niflumate (Valach et al, 1997), clofibriate (Moncol´et al, 2001), trichloracetate (Mú dra et al, 2003), dichloracetate (Mú dra et al, 2003) and flufenamate (Lö rinc et al, 2004). The Cu-O eq (O atom of the carboxylate group), Cu-N eq (N atom of the pyridine ring of ronicol) and Cu-O ax (O atom of the hydroxy group of ronicol) bond lengths are 1.944 (4), 2.039 and 2.622 (4) Å for salicylate, 1.946 (3), 2.038 (3) and 2.573 (3) Å for niflumate, 1.989 (2), 2.008 (2) and 2.441 (1) Å for clofibriate, 2.013 (1), 2.012 (2) and 2.359 (1) Å for trichloracetate, 1.983 (1), 2.023 (2) and 2.471 (2) Å for dichloracetate, and 1.974 (2), 2.028 (2) and 2.404 (1) Å for flufenamate.…”