Structural diversity of manganese(II) complexes containing 2,2′-dipyridylamine and benzenedicarboxylates. Conformational analysis of tere-, iso- and phthalate ions: An experimental and quantum chemical approach

Diaquabis(2,2’-dipyridylamine)M(II) Terephthalate Dihydrates, M(II) = Ni, Co: Synthesis, Crystal Structures, Thermal and Magnetic Properties

“…The bond lengths and angles (Table 2) are as expected for dipya-tpht TM complexes with octahedral environment. [11][12][13][14] The deviation of M(II) atom from planarity of the equatorial plane is not substantial, being 0.0024(6) Å for 1 and only 0.0011(6) Å for 2, while the shortest M(II)···M(II) distances are 7.660(2) and 7.664(2) Å in 1 and 2, respectively. The similar [M(dipya) 2 27 but with slightly smaller deviation of Co(II) atom from the basal plane of polyhedron (0.009 Å).…”

“…The determined enthalpy of dehydration obtained by integration of DSC peak area is 218 kJ mol -1 , and it is in a good agreement with values that were already found for several similar ternary BDC complexes. 11,29,30 It was previously evaluated that average molar enthalpy per one hydrogen . 30 In 1, four water molecules participate in the formation of even nine hydrogen bonds, thus it can be conclude that molar enthalpy per one Ni-OH 2 coordinative bond is equal to 37 kJ mol -1 .…”

Structure and properties of ZnO/ZnMn2O4 composite obtained by thermal decomposition of terephthalate precursor

“…The structural characterization of each phase was performed by the Rietveld method according to the known crystal structures of [Mn(dipya)(H 2 O) 4 ](tpht) and {[Zn(dipya)(tpht)]•H 2 O} n determined from the single crystal data. 17,18 The quantitative analysis showed that [Mn(dipya)(H 2 O) 4 ](tpht):{[Zn(dipya)(tpht)]•H 2 O} n phase-ratio was 31:69 mas.%. The Rietveld refinement results (Tables I and S-I) displayed a minor deviation from the final structural parameters measured in the original structures.…”

“…14 As a contribution to our previous research 16 relating the design and synthesis of mono-and heteronuclear TM complexes to prepare new functional materials, here we presented the synthesis, spectral and structural properties of a new biphasic Mn/Zn complex precursor (I) composed of coordination compounds [Mn(dipya)(H 2 O) 4 ](tpht) and {[Zn(dipya)(tpht)]•H 2 O} n (dipya = 2,2'-dipyridylamine), whose crystal structures have been described previously. 17,18 Following the preparation of the oxide nanomaterials by solid-state thermal decomposition of TM complexes, the biphasic complex I has been used as a single-source precursor for the synthesis of a composite powder II containing ZnO and ZnMn 2 O 4 .…”

Metal-directed supramolecular architectures based on the bifunctional ligand 2,5-bis(1H-1,2,4-triazol-1-yl)terephthalic acid

“…On the other hand, due to the diversity of connecting modes and highly structural stability, polycarboxylate (benzenedicarboxylate, benzenetribenzoate and biphenyl tetracarboxylate) and nitrogen heterocyclic (imidazole, triazole and their derivatives) ligands have been employed extensively as ISSN 2053ISSN -2296 # 2020 International Union of Crystallography chelating or bridging linkers (Radovanović et al, 2016;Su et al, 2015;Chang et al, 2014;Wang et al, 2015b;Zhong et al, 2016). In recent years, these two kinds of ligands have been used at the same time to construct functional coordination polymers with particular topological structures (Liu et al, 2015;Wang et al, 2019;Deng et al, 2018).…”