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Darstellung und Eigenschaften von und Reaktionen mit metallhaltigen Heterocyclen, XLIV. Einfluß der Ligandensphäre am Mangan auf die Stabilität der fünfgliedrigen Heterocyclen
Author(s) -
Lindner Ekkehard,
Brösamle Andreas
Publication year - 1985
Publication title -
chemische berichte
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 0009-2940
DOI - 10.1002/cber.19851180533
Subject(s) - chemistry , medicinal chemistry , ligand (biochemistry) , manganese , ether , metal , stereochemistry , organic chemistry , receptor , biochemistry
Preparation and Properties of, and Reactions with, Metal‐Containing Heterocycles, XLIV. Influence of the Ligand Sphere at Manganese on the Stability of the Five‐membered Heterocycles The five‐membered heterocycle ( 3b ) is obtained by reductive cyclization of the bifunctionalized complex (OC) 3 (Ph 3 P)(Br)MnPPh 2 OCH 2 CH 2 Cl ( 2 b ) with sodium amalgam at −5°C in ether. A meridional arrangement of the CO groups and the trans ‐position of the two P atoms in 2b, 3b can be deduced from the IR and 31 P{ 1 H} NMR spectra. Compared to 3a the phosphane ligand causes a destabilization of 3b .