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Trifunctional Phosphane Ligands and Their Application in the Synthesis of Novel Cage‐Structured Platinacyclophanes and Trinuclear Chain‐Like Platinacycles by Self‐Assembly
Author(s) -
Lindner Ekkehard,
Khanfar Monther,
Steimann Manfred
Publication year - 2001
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/1099-0682(200109)2001:9<2411::aid-ejic2411>3.0.co;2-8
Subject(s) - chemistry , alkyl , platinum , tris , polymer chemistry , medicinal chemistry , proton nmr , self assembly , polymer , stereochemistry , combinatorial chemistry , organic chemistry , catalysis , biochemistry
The synthesis of the 1,3,5‐tris[(diphenylphosphoryl)alkyl]benzenes 7 − 10 succeeds by reaction of the corresponding 1,3,5‐tris(bromoalkyl)benzenes 3 − 6 with ethyl diphenylphosphinite in an Arbusov‐type reaction. Reduction of these phosphane oxides leads to the trifunctional phosphane ligands 11 − 14 . Their potency of self‐assembly was examined by the employment of platinum(II) complex fragments. A five‐component self‐assembly consisting of 3 equiv. of the platinum complex Cl 2 Pt(NCPh) 2 and 2 equiv. of the ligands 11 − 14 under high‐dilution conditions led to the formation of the nanoscaled triplatinacyclophanes 1 and 15 − 17 . Polymers were formed as by‐products from the reactions between 11 − 13 and Cl 2 Pt(NCPh) 2 , whereas in the case of 14 three other platinacyles 18 − 20 with a chain‐like structure were formed. The structures of the metallacycles 1 and 15 − 17 as well as 18 − 20 were elucidated by 31 P{ 1 H}, 13 C{ 1 H}, and 195 Pt{ 1 H} NMR spectroscopic investigations.