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http://nopr.niscpr.res.in/handle/123456789/18082| Title: | Reactions of [(µ-H) Os3(CO)8- {Ph2PCH2P(Ph)C6H4}] and [Os3(CO)10 (µ-dppm)] with 2-mercaptoimidozole, 2-mercaptobenzimidazole and 2-mercaptobenzothiazole: X-ray structure of [(µ-H)Os3(CO)8(µ-dppm)(µ-η1-SN2C3H3)] |
| Authors: | Begum, Noorjahan Hassan, Md Manjur Hossain, G M Golzar Kabir, Shariff E |
| Issue Date: | Apr-2005 |
| Publisher: | NISCAIR-CSIR, India |
| IPC Code: | Int. C17, C07F 15/00 |
| Abstract: | The electron-deficient compound [(µ-H)Os3(CO)8-{Ph2PCH2P(Ph)C6H4}] 2 reacts with 2-mercaptoimidozole, 2- mercaptobenzimidazole and 2-mercaptobenzothiazole at 80°C to give [(µ-H)Os3(CO)8(µ-dppm)(µ-η1-SN2C3H3)] 3, [(µ-H)Os3(CO)8(µ-dppm)(µ-η1-SN2C7H5)] 4 and [(µ-H)Os3(CO) 8(µ-dppm)(µ-η1-SN2C7H5)] 5 in 30, 50 and 59% yields, respectively. The compounds are formed by the oxidative addition of S-H bond followed by demetallation of the phenyl ring of the orthometallated dppm ligand. Compounds 3-5 have also been obtained from the reactions of [Os3(CO)10(µ-dppm)] 1 with 2- mercaptoimidozole, 2-mercaptobenzimidazole and 2- mercaptobenzothiazole, respectively at 110ºC but in some what lower yields. The compounds have been characterized by elemental analysis, IR, IH NMR and 31p{1H} NMR spectroscopic data together with single crystal X-ray diffraction studies for 3. Compound 3 crystallizes in the triclinic space group PI with a=11.3453(12), b=13.651(2), c=15.069(2) Å, α=84.709(l1), b=72.7C6(9), γ=68.265(9)º, Z=2 and V=2069.5(4) Å3. The structure consists of an equilateral triangle of osmium atoms with a bridging dppm, a bridging hydride and a bridging 2- mercaptoimidazolato ligand. |
| Page(s): | 723-728 |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Appears in Collections: | IJC-A Vol.44A(04) [April 2005] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCA 44A(4) 723-728.pdf | 1.35 MB | Adobe PDF | View/Open |
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