Knoevenagel condensation and cyanosilylation reactions catalyzed by a MOF containing coordinatively unsaturated Zn(II) centers

Neogi, Subhadip ; Sharma, Manish K. ; Bharadwaj, Parimal K. (2009) Knoevenagel condensation and cyanosilylation reactions catalyzed by a MOF containing coordinatively unsaturated Zn(II) centers Journal of Molecular Catalysis A: Chemical, 299 (1-2). pp. 1-4. ISSN 1381-1169

Full text not available from this repository.

Official URL: http://www.sciencedirect.com/science/article/pii/S...

Related URL: http://dx.doi.org/10.1016/j.molcata.2008.10.008

Abstract

An aqueous solution of Zn(NO3)2·6H2O reacts with tetraethylammonium salt of the tripodal ligand tris-(4-carboxy-2-phenoxyethyl)amine (ptaH3) at room temperature, to form infinite interlinked 2D metallocycles. These 2D networks stack to form an overall 3D structure (1) where lattice water molecules occupy the metallocyclic cavities. On heating to 110 ° C for 5 h under vacuum, 1 loses metal bound water molecules as well as lattice ones without framework collapse and leaves the metal ion coordinatively unsaturated. The coordination space in the structure (1a) can be utilized for Knoevenagel and cyanosilation reactions to give biologically important molecules. These reactions are catalyzed by Zn(II) centers which are coordinatively unsaturated. Larger carbonyl substrates cannot diffuse through the pores of 1a, and afford poor yields of the desired products.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Heterogeneous Catalysis; MOF; Unsaturated Metal Centers; Tripodal Ligands
ID Code:78685
Deposited On:23 Jan 2012 03:57
Last Modified:23 Jan 2012 03:57

Repository Staff Only: item control page