Water-soluble bis(4′-[2,2,2-tris(hydroxymethyl)ethoxy]-2,2′:6′,2″-terpyridine)metal complexes

摘要: Abstract A series of homoleptic metal complexes containing the pentaerythritol-functionalized ligand 1 (4′-(2,2,2-tris(hydroxymethyl)ethoxy)-2,2′:6′,2″-terpyridine) has been synthesized. In MeOH and under microwave conditions, 2,2,2-tris(hydroxymethyl)ethoxy substituent is cleaved replaced by a methoxy group originating from solvent. This confirmed single crystal structure [Zn(2)2][PF6]2 (2 = 4′-methoxy-2,2′:6′,2″-terpyridine). The [Zn(1)2][OAc]2, [Fe(1)2]Cl2 [Co(1)2][PF6]2 were therefore prepared mild conditions; readily oxidizes to [Co(1)2][PF6]3; conversion paramagnetic [Co(1)2]2+ diamagnetic [Co(1)2]3+ monitored 1H NMR spectroscopy. are hygroscopic highly soluble in water; most [Zn(1)2][OAc]2 (71 mmol dm−3). Structural data for 1, [Zn(1)2][PF6]2, 4{[Zn(1)2][PF6]2}·3MeCN, [Zn(1)(OAc-O)2]·2MeOH 2{[Co(1)2][PF6]3}·1.5MeCN·1.5H2O confirm that dominant packing forces involve hydrogen bonds between pendant units.