K2ReCl6 (IV), after precipitation from solutions of HCl36 with nitron, contained no significant radioactivity. Cs2ReOCl5 (V), insoluble in HCl, after suspension in methanol containing HCl36 and filtration was radioactive. An x-ray diffraction determination of the Cs2ReOCl6 unit cell parameters and a microscopic estimation of the surface of the samples made possible the calculation of 83% exchange of the surface chlorine atoms. Results agree with the generalization that octohedral complexes with no vacant d orbitals are inert, whereas those with at least one vacant d orbital are labile. Cs2ReOCl5 is a yellow-brown crystalline solid, insoluble in dilute HCI. X-ray diffraction determination gave hexagonal unit cell parameters of a =7.04A0 and C=10.9A0
Proceedings of the Iowa Academy of Science
©1969 Iowa Academy of Science, Inc.
Woods, Joe D.; Gruca, JoAnn; and Pietrzak, Carl M.
"Comparison of Chlorine-36 Exchange With K2ReCl6 and Cs2 ReOCl5,"
Proceedings of the Iowa Academy of Science, 76(1), 119-126.
Available at: https://scholarworks.uni.edu/pias/vol76/iss1/18