Carboxylate and Furan-Ring Oxygen Bonded to Calcium in Polymeric Calcium Furoate

Synthesis, Structure, and Spectroscopic Properties of Calcium Thiophenecarboxylate Polymers. Structural Comparison with Analogous Lead Complexes

“…The Ca(II) ions of 3 are in a distorted dodecahedral coordination environment that includes the O‐donors of two water molecules and six O‐donors from the 3tpacCOO − ligands. The Ca−O (carboxylate) bond lengths are in the range of 2.348(4)‐2.584(4) Å and agree with those reported for heteroaromatic carboxylate‐based calcium polymers [17–24] . Adjacent two eight‐coordinated Ca(II) ions are bridged by two carboxylate groups from two 3tpacCOO − ligands to form pseudodimeric building blocks running along the a axis with a neighbouring Ca⋅⋅⋅Ca distance of 3.9290(1) Å (Figure 2b).…”

“…The CaÀ O (carboxylate) bond lengths are in the range of 2.348(4)-2.584(4) Å and agree with those reported for heteroaromatic carboxylate-based calcium polymers. [17][18][19][20][21][22][23][24] Adjacent two eight-coordinated Ca(II) ions are bridged by two carboxylate groups from two 3tpacCOO À ligands to form pseudodimeric building blocks running along the a axis with a neighbouring Ca•••Ca distance of 3.9290(1) Å (Figure 2b). In this way, the zig-zag chains are bridged by the CÀ H•••S interaction to generate a 3D framework (Figure 2c).…”

Thermochemical study of 2,5-dimethyl-3-furancarboxylic acid, 4,5-dimethyl-2-furaldehyde, and 3-acetyl-2,5-dimethylfuran

“…The calculated enthalpies of sublimation obtained from each individual orifice are in agreement within experimental associated uncertainty. The equilibrium pressure at the mean temperature range p(T = hTi) and the entropies of sublimation, at equilibrium conditions are also presented in table 6. The entropies of sublimation, at equilibrium conditions, were calculated as…”

“…The specific densities of the liquid compounds taken from the Aldrich catalogue [5] are 1.038 g Á cm À3 and 1.016 g Á cm À3 , respectively, for 3-acetyl-2,5-dimethylfuran and 4,5-dimethyl-2-furaldehyde. The specific density of 3-furoic acid, 1.503 g Á cm À3 [6], was assumed for 2,5-dimethyl-3-furancarboxylic acid.…”