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Symmetrische 3,3,3′,3′‐Tetraalkyl‐1,1′‐alkandioylbis(thioharnstoffe) als neue Chelatliganden
Author(s) -
König KarlHeinz,
Kuge Martin,
Kaul Lothar,
Pletsch HansJürgen
Publication year - 1987
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.19871200723
Subject(s) - chemistry , chelation , thiocyanate , potassium thiocyanate , palladium , platinum , toluene , alkyl , medicinal chemistry , solvent , polymer chemistry , organic chemistry , catalysis
symmetrical 3,3,3′,3′‐Tetraalkyl‐1,1′‐alkanedioylbis(thioureas) as New Chelate Ligands The synthesis of some new alkyl‐alkanedioylbis(thioureas) ( 3 – 6 ) by reaction of dicarboxylic dichlorides with potassium thiocyanate and secondary amines is described. They act as bisbidentate S,O ligands toward bivalent metal ions which form stable neutral chelates ( 7 – 10 ) extractable with apolar solvents like CHCl 3 or toluene. The chelates of palladium and platinum ( 9 and 10 ) can be separated by chromatography and selectively extracted by solvent extraction.