Anation of cis-aquoerythro chromium(III) ion by thiocyanate ion in acidic aqueous solution
| ISSN: |
0022-1902
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|---|---|
| Source: |
Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
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| Topics: |
Chemistry and Pharmacology
Energy, Environment Protection, Nuclear Power Engineering
|
| Type of Medium: |
Electronic Resource
|
| URL: |
| _version_ | 1798290987293868032 |
|---|---|
| autor | Po, H.N. Chung, Y.H. Davis, S.R. Enomoto, H. |
| autorsonst | Po, H.N. Chung, Y.H. Davis, S.R. Enomoto, H. |
| book_url | http://dx.doi.org/10.1016/0022-1902(74)80076-X |
| datenlieferant | nat_lic_papers |
| fussnote | The rate of anation of cis-aquoerythro ion, cis-(NH"3)"5Cr(OH)Cr(NH"3)"4(OH"2)^5^+, by thiocyanate ion has been studied in aqueous perchlorate solution. The reactions were conducted under the following experimental conditions: t = 25.0^o, 32.1^o, 35.6^o and 40.8^o, [cis-aquoerythro] = (7.0-10.0) x 10^-^3 M, [H^+] = 0.1-0.01 M, [NaSCN] = 0.1-0.8 M and μ = 1.0 M(NaClO"4). The observed rate law is first-order in cis-aquoerythro ion concentration, independent of hydrogen ion concentration, and linearly dependent in thiocyanate ion concentration. Therefore, the rate law can be expressed as: R = (k"a + k"b[SCN^-])[cis-aquoerythro], and the values of k"a and k"b at 25^o are 0.344 x 10^-^4 sec^-^1 and 1.01 x 10^-^4 M^-^1 sec^-^1. The mechanism postulated for the anation reaction involves the SN1 type and SN1 I.P. (ion pairing) mechanistic steps. The ion-pairing process is supported by the activation parameters (ΔH = 19.9 kcal/mole, ΔS = -10.2 e.u.) which is similar to the values reported for an analogous aquopentaaminechromium(III)-NCS^- system. The competitive cleavage reaction of the cis-aquoerythro ion can be estimated from the cleavage rate data and its contribution accounts for 9-17 per cent of the overall reaction. |
| hauptsatz | hsatz_simple |
| identnr | NLZ175277443 |
| issn | 0022-1902 |
| journal_name | Journal of Inorganic and Nuclear Chemistry |
| materialart | 1 |
| package_name | Elsevier |
| publikationsort | Amsterdam |
| publisher | Elsevier |
| reference | 36 (1974), S. 1349-1353 |
| search_space | articles |
| shingle_author_1 | Po, H.N. Chung, Y.H. Davis, S.R. Enomoto, H. |
| shingle_author_2 | Po, H.N. Chung, Y.H. Davis, S.R. Enomoto, H. |
| shingle_author_3 | Po, H.N. Chung, Y.H. Davis, S.R. Enomoto, H. |
| shingle_author_4 | Po, H.N. Chung, Y.H. Davis, S.R. Enomoto, H. |
| shingle_catch_all_1 | Po, H.N. Chung, Y.H. Davis, S.R. Enomoto, H. Anation of cis-aquoerythro chromium(III) ion by thiocyanate ion in acidic aqueous solution 0022-1902 00221902 Elsevier |
| shingle_catch_all_2 | Po, H.N. Chung, Y.H. Davis, S.R. Enomoto, H. Anation of cis-aquoerythro chromium(III) ion by thiocyanate ion in acidic aqueous solution 0022-1902 00221902 Elsevier |
| shingle_catch_all_3 | Po, H.N. Chung, Y.H. Davis, S.R. Enomoto, H. Anation of cis-aquoerythro chromium(III) ion by thiocyanate ion in acidic aqueous solution 0022-1902 00221902 Elsevier |
| shingle_catch_all_4 | Po, H.N. Chung, Y.H. Davis, S.R. Enomoto, H. Anation of cis-aquoerythro chromium(III) ion by thiocyanate ion in acidic aqueous solution 0022-1902 00221902 Elsevier |
| shingle_title_1 | Anation of cis-aquoerythro chromium(III) ion by thiocyanate ion in acidic aqueous solution |
| shingle_title_2 | Anation of cis-aquoerythro chromium(III) ion by thiocyanate ion in acidic aqueous solution |
| shingle_title_3 | Anation of cis-aquoerythro chromium(III) ion by thiocyanate ion in acidic aqueous solution |
| shingle_title_4 | Anation of cis-aquoerythro chromium(III) ion by thiocyanate ion in acidic aqueous solution |
| sigel_instance_filter | dkfz geomar wilbert ipn albert fhp |
| source_archive | Elsevier Journal Backfiles on ScienceDirect 1907 - 2002 |
| timestamp | 2024-05-06T08:25:27.823Z |
| titel | Anation of cis-aquoerythro chromium(III) ion by thiocyanate ion in acidic aqueous solution |
| titel_suche | Anation of cis-aquoerythro chromium(III) ion by thiocyanate ion in acidic aqueous solution The rate of anation of cis-aquoerythro ion, cis-(NH"3)"5Cr(OH)Cr(NH"3)"4(OH"2)^5^+, by thiocyanate ion has been studied in aqueous perchlorate solution. The reactions were conducted under the following experimental conditions: t = 25.0^o, 32.1^o, 35.6^o and 40.8^o, [cis-aquoerythro] = (7.0-10.0) x 10^-^3 M, [H^+] = 0.1-0.01 M, [NaSCN] = 0.1-0.8 M and μ = 1.0 M(NaClO"4). The observed rate law is first-order in cis-aquoerythro ion concentration, independent of hydrogen ion concentration, and linearly dependent in thiocyanate ion concentration. Therefore, the rate law can be expressed as: R = (k"a + k"b[SCN^-])[cis-aquoerythro], and the values of k"a and k"b at 25^o are 0.344 x 10^-^4 sec^-^1 and 1.01 x 10^-^4 M^-^1 sec^-^1. The mechanism postulated for the anation reaction involves the SN1 type and SN1 I.P. (ion pairing) mechanistic steps. The ion-pairing process is supported by the activation parameters (ΔH = 19.9 kcal/mole, ΔS = -10.2 e.u.) which is similar to the values reported for an analogous aquopentaaminechromium(III)-NCS^- system. The competitive cleavage reaction of the cis-aquoerythro ion can be estimated from the cleavage rate data and its contribution accounts for 9-17 per cent of the overall reaction. |
| topic | V ZP |
| uid | nat_lic_papers_NLZ175277443 |