Syntheses of the linkage isomers (H2O)5CrNCCo(CN)5 and (H2O)5CrCNCo(CN)5 |
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| Affiliation: | 1. Department of Chemistry, Faculty of Science, Sohag University, 82524, Sohag, Egypt;2. Chemistry Department, Faculty of Science, Taibah University, Madinah, Saudi Arabia;3. Pharmaceutical Chemistry Department, Faculty of Pharmacy, Al Azhar University, Egypt;4. Chemistry Department, Faculty of Science, Cairo University, Giza, Egypt;5. University of Jeddah, Department of Biological Sciences, Faculty of Science, Jeddah, Saudi Arabia;6. Department of Chemistry, College of Science, King Saud University, Riyadh, 11451, Saudi Arabia;1. Department of Chemistry, Osmania University, Hyderabad, Telangana 500007, India;2. Department of Chemistry, BITS-Pilani Hyderabad Campus, Telangana 500078, India;1. Chimie ParisTech, PSL University, CNRS, Institute of Chemistry for Life and Health Sciences, Laboratory for Inorganic Chemical Biology, F-75005, Paris, France;2. Université Paris-Saclay, CNRS, Institut de Chimie des Substances Naturelles, UPR 2301, 91198, Gif-sur-Yvette, France;1. College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, Hubei 443002, PR China;2. Univ Rennes, CNRS, ISCR (Institut des Sciences Chimiques de Rennes) – UMR 6226, F-35000 Rennes, France;1. Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Lembah Pantai, Kuala Lumpur, Malaysia;2. Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Lembah Pantai, Kuala Lumpur, Malaysia |
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| Abstract: | ![]()
The slow reaction of Cr(H2O)63+ with Co(CN)63− produces (H2O)CrNCCo(CN)5. The rapid reaction of Co(CN)5N33− with nitrious acid in the presence of Cr)OH2)5CN2+ produces (H2O)5CrCNCo(CN)5. The two binuclear complexes were separated and purified by cation and anion exchange procedures. The orientation of the bridging cyanide in the isomeric complexes was determined by a spectroscopic technique. For (H2O)5CrNCCo(CN)5 the 4A2g → 4T2g and 4A2g → 4T1g of the chromium moiety are at 560 and 401 nm, respectively, and the 1A1g → 1T1g of the cobalt moiety is at 310 nm. For (H2O)5CrCNCo(CN)5 the 4A2g → 4T2g band is at 552 nm, but the 4A2g → 4T1g absorption of the chromium is obscured by the 1A1g → 1T1g transition of the cobalt at 347 nm. The base hydrolysis of (H2O)5CNCCo(CN)5 produces Co(CN)63− and “chromite” quantitatively. The vase hydrolysis of (H2O)5CrCNCo(CN)5 produces chromite and an unidentified cobalt(III) species that absorbs at 345–347 nm. |
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