Crystal and molecular structure of copper(II)(pyridine-2,6-dicarboxylato)(2,6-dimethanolpyridine) |
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| Affiliation: | 1. G. A. Razuvaev Institute of Organometallic Chemistry of Russian Academy of Sciences, Tropinina 49, 603950 Nizhny Novgorod, GSP-445, Russia;2. A. N. Nesmeyanov Institute of Organoelement Compounds of Russian Academy of Sciences, 28 Vavilova str., 119991, Moscow GSP-1, Russia;1. Inflammation & Allergic Diseases Research Unit, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, China;2. State Key Laboratory of Respiratory Disease for Allergy at Shenzhen University, Shenzhen University School of Medicine, Shenzhen 518060, China;3. The School of Basic Medical Sciences, Southwest Medical University, Luzhou, Sichuan 646000, China;4. Model Animal Research Center, Nanjing University, Nanjing 210061, China;1. National Center for Combustion and Plasma Technologies, Water and Energy Research Institute, King Abdulaziz City for Science and Technology (KACST), P.O. Box 6086, 11442, Riyadh, Saudi Arabia;2. School of Mechanical Engineering, University of Western Macedonia, Bakola & Sialvera, GR-50100, Kozani, Greece;3. Chemical Process & Energy Resources Institute, Centre for Research & Technology Hellas, 6th km, Charilaou – Thermi Rd., P.O. Box 60361, GR-57001, Thermi, Thessaloniki, Greece;4. School of Production Engineering and Management, Technical University of Crete, GR-73100, Chania, Crete, Greece;1. The Petroleum and Petrochemical College, Chulalongkorn University, Bangkok, Thailand;2. Center for Petroleum, Petrochemical, and Advanced Materials, Chulalongkorn University, Bangkok, Thailand |
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| Abstract: | Copper(II)(pyridine-2,6-dicarboxylato)(2,6-dimethanolpyridine) has been prepared and studied by the single crystal X-ray diffraction methods at 293(2) K. The compound crystallises in an orthorhombic system, space group Pbcn with a=8.196(2), b=13.124(3), c=25.612(5) Å, and Z=8 (R=0.0374 for 3175 independent reflections with I>2σ(I)). Crystal structure analysis revealed that the copper(II) atom is surrounded by two non-equivalent terdentate ligands making up an ‘all-trans’ elongated octahedral arrangement. In consequence of Jahn–Teller distortion, considerable differences are found between the ligands for the pyridine-2,6-dicarboxylate anion with the values Cu–N 1.892(3), Cu–O 2.033(2) and 2.063(2) Å, while for the 2,6-dimethanolpyridine ligand the values are 1.943(3), 2.341(3) and 2.433(2) Å. There is a relationship between the Cu–L bond distances and the five-membered metallocyclic rings (O–Cu–N). The data are compared and discussed with those found in familiar CuL2 compounds with the CuO4N2 chromophore. Based on the molecular structure, the electronic, IR and EPR spectra are discussed. |
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