|
|||||
|
|
Oxime-substituted NCN-pincer palladium and platinum halide polymers through non-covalent hydrogen bonding (NCN = [C6H2(CH2NMe2)2-2,6]) |
|
| Authors: | Stefan Köcher Anthony L Spek Tobias Rüffer Gerard van Koten |
| Institution: | a Technische Universität Chemnitz, Fakultät für Naturwissenschaften, Institut für Chemie, Lehrstuhl für Anorganische Chemie, Straße der Nationen 62, 09111 Chemnitz, Germany b Bijvoet Center for Biomolecular Research, Crystal and Structural Chemistry, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands c Debye Institute, Organic Synthesis and Catalysis, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands |
| Abstract: | The oxime-substituted NCN-pincer molecules HON CH-1-C6H3(CH2NMe2)2-3,5 (2a) and HONCH-4-C6H2(CH2NMe2)2-2,6-Br-1 (2b) were accessible by treatment of the benzaldehydes H(O)C-4-C6H3(CH2NMe2)2-3,5 (1a) and H(O)C-4-C6H2(CH2NMe2)2-2,6-Br-1 (1b) with an excess of hydroxylamine. In the solid state both compounds are forming polymers with intermolecular O-H?N connectivities between the Me2NCH2 substituents and the oxime entity of further molecules of 2a and 2b, respectively. Characteristic for 2a and 2b is a helically arrangement involving a crystallographic 21 screw axis of the HONCH-1-C6H3(CH2NMe2)2-3,5 and HONCH-4-C6H2(CH2NMe2)2-2,6-Br-1 building blocks.The reaction of 2b with equimolar amounts of Pd2(dba)3 · CHCl3] (3) (dba = dibenzylidene acetone) or Pt(tol)2(SEt2)]2 (4) (tol = 4-tolyl) gave by an oxidative addition of the C-Br unit to M coordination polymers with a (HONCH-4-C6H2(CH2NMe2)2-2,6)MBr] repeating unit (5: M = Pd, 6: M = Pt). Complexes 5 and 6 are in the solid state linear hydrogen-bridged polymers with O-H?Br contacts between the oxime entities and the metal-bonded bromide. |
| Keywords: | Oxime Palladium Platinum Coordination Polymer Non-covalent hydrogen bonding Molecular recognition |
| 本文献已被 ScienceDirect 等数据库收录！ | |