Redistribution of terpy ligands—approaches to new dynamic combinatorial libraries
作者:Edwin C. Constable、Catherine E. Housecroft、Torsten Kulke、Chiarra Lazzarini、Emma R. Schofield、Yves Zimmermann
DOI:10.1039/b104865c
日期:——
Mixing solutions of homoleptic cobalt(II) complexes [CoA2]2+ and [CoB2]2+ results in the establishment of a combinatorial library containing the heteroleptic complex [CoAB]2+. By using enantiomorphic ligands A and B the reactions may be followed by 1H NMR spectroscopy. Exchange reactions with 6-substituted ligands are slower than those with 5- and 4â²-substituted species.
Regio- and diastereo-selective formation of dicopper(I) and disilver(I) double helicates with chiral 6-substituted 2,2′∶6′,2″-terpyridines
作者:Gerhard Baum、Edwin C. Constable、Dieter Fenske、Catherine E. Housecroft、Torsten Kulke、Markus Neuburger、Margareta Zehnder
DOI:10.1039/a909158k
日期:——
dinuclear double-helical complexes was observed with silver(I) salts. The doublehelicates are formed with good to excellent diastereoselectivity for helical chirality. With these 6-substituted ligands, doublehelicates can exist as head-to-head (HH) or head-to-tail (HT) isomers; in solution, the HT isomers are favored, although solid state interactions can overcome this preference.