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Platinum Complexes with a Phosphino‐Oxime/Oximate Ligand
Author(s) -
Francos Javier,
Borge Javier,
Conejero Salvador,
Cadierno Victorio
Publication year - 2018
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/ejic.201800398
Subject(s) - chemistry , deprotonation , oxime , medicinal chemistry , ligand (biochemistry) , platinum , derivative (finance) , stereochemistry , benzaldehyde , catalysis , organic chemistry , ion , receptor , biochemistry , financial economics , economics
The platinum(II) complex [PtCl 2 (COD)] ( 2 ; COD = 1,5‐cyclooctadiene) reacted with 1 and 2 equiv. of 2‐(diphenylphosphanyl)benzaldehyde oxime ( 1 ) to generate [PtCl 2 {κ 2 ‐( P,N )‐2‐Ph 2 PC 6 H 4 CH=NOH}] ( 3 ) and [Pt{κ 2 ‐( P,N )‐2‐Ph 2 PC 6 H 4 CH=NOH} 2 ][Cl] 2 ( 4 ), respectively. Deprotonation of the oxime hydroxyl group of 3 with Na 2 CO 3 led to the selective formation of the dinuclear species (µ‐O)‐[PtCl{κ 2 ‐( P,N )‐2‐Ph 2 PC 6 H 4 CH=NO}] 2 ( 5 ), while the related methylated derivative (µ‐O)‐[PtMe{κ 2 ‐( P,N )‐2‐Ph 2 PC 6 H 4 CH=NO}] 2 ( 7 ) could be obtained from the direct reaction of [PtMe 2 (COD)] ( 6 ) with the phosphino‐oxime ligand 1 . In the case of 4 , its treatment with Na 2 CO 3 yielded complex [Pt({κ 2 ‐( P,N )‐2‐Ph 2 PC 6 H 4 CH=NO} 2 H)][Cl] ( 8 ), as a result of the deprotonation of only one of the OH groups of 4 . On the other hand, contrary to what was observed with 6 , no deprotonation of the oxime occurred in the reaction of [PtMe 3 I] 4 ( 9 ) with 1 , from which the mononuclear Pt IV derivative fac ‐[PtIMe 3 {κ 2 ‐( P,N )‐2‐Ph 2 PC 6 H 4 CH=NOH}] ( 10 ) was isolated. The solid‐state structures of compounds 3 , 4 , 7 and 10 were determined by X‐ray crystallography. In addition, the potential of all the synthesized complexes as catalysts for the dehydrogenative coupling of hydrosilanes with alcohols is also briefly discussed.