Selective hydrogenation of chloronitrobenzenes with an MCM-41 supported platinum allyl complex derived catalyst
| Title | Selective hydrogenation of chloronitrobenzenes with an MCM-41 supported platinum allyl complex derived catalyst |
| Publication Type | Journal Article |
| Year of Publication | 2011 |
| Authors | Indra, A, Rajamohanan, PR, Gopinath, CS, Bhaduri, S, Lahiri, GKumar |
| Journal | Applied Catalysis A-General |
| Volume | 399 |
| Issue | 1-2 |
| Pagination | 117-125 |
| Date Published | MAY |
| ISSN | 0926-860X |
| Keywords | Chloronitrobenzenes, Dehydrohalogenation, heterogeneous catalyst, MCM-41, Selective hydrogenation |
| Abstract | A platinuin precatalyst (1) has been prepared by reacting [(eta(3)-C3H5)(4)Pt4Cl4] with surface functionalized MCM-41 with pendant -(CH2)(3)NH(CH2)(2)NH2 groups. For the hydrogenation of o-, m- and p-chloronitrobenzenes to the corresponding chloroanilines, 1 is found to be a highly active catalyst with good selectivities for them-and p-isomers. Its performance is superior to that of its palladium analogue and far superior to that of commercial (5%) Pt/C or (5%) Pt/Al2O3. Comparison of solid state and solution NMR data and other evidences indicate that on treatment with the functionalized MCM-41 support; [(eta(3)-C3H5)(4)Pt4Cl4] loses the ally! ligand. XPS data show that in the fresh catalyst Pt is present in the 2+ oxidation state. Based on these and analytical data, co-ordination by surface diamine and hydroxo groups to Pt2+ in 1 is suggested. In the used catalyst both Pt2+ and Pt are present but the amount of metallic platinum is similar to 16% of the total. (C) 2011 Elsevier B.V. All rights reserved. |
| DOI | 10.1016/j.apcata.2011.03.044 |
| Type of Journal (Indian or Foreign) | Foreign |
| Impact Factor (IF) | 3.903 |