Synthesis and characterization of rhodium, iridium, and palladium complexes of a diarylamido-based PNSb pincer ligand

A new diarylmido-based pincer proto ligand ( iPr PN H Sb Ph ) with one -PPr i 2 and one -SbPh 2 side donor has been synthesized. Three complexes of its amido form were prepared using standard metalation techniques: ( iPr PNSb Ph ) PdCl , ( iPr PNSb Ph ) RhCO , and ( iPr PNSb Ph ) Ir(COE) , where COE...

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Bibliographic Details
Published in:Dalton transactions : an international journal of inorganic chemistry 2018, Vol.47 (33), p.11619-11624
Main Authors: Kosanovich, Alex J, Jordan, Aldo M, Bhuvanesh, Nattamai, Ozerov, Oleg. V
Format: Article
Language:English
Subjects:
Alkynes
Dehydrogenation
Infrared radiation
Ligands
Palladium
Rhodium
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Summary:A new diarylmido-based pincer proto ligand ( iPr PN H Sb Ph ) with one -PPr i 2 and one -SbPh 2 side donor has been synthesized. Three complexes of its amido form were prepared using standard metalation techniques: ( iPr PNSb Ph ) PdCl , ( iPr PNSb Ph ) RhCO , and ( iPr PNSb Ph ) Ir(COE) , where COE = cis -cyclooctene. These complexes were compared with their previously reported analogs incorporating a -PPh 2 side donor in place of -SbPh 2 . The -SbPh 2 donor arm is less donating towards the metal and is less strongly trans -influencing, based on the structural and IR spectroscopic analysis of the Rh complexes. The redox potential of the Pd complexes is only marginally affected by the change from -PPh 2 to -SbPh 2 . ( iPr PNSb Ph )Ir(COE) proved to be a slower and less selective catalyst in the dehydrogenative borylation of terminal alkynes (DHBTA) than its -PPh 2 analog. A new diarylmido-based pincer proto ligand ( iPr PN H Sb Ph ) with one -PPr i 2 and one -SbPh 2 side donor has been synthesized.
ISSN:1477-9226
1477-9234
DOI:10.1039/c8dt02207k