TY - JOUR
T1 - Synthesis, characterization and reactivity of iridium pincer complexes
AU - Shafiei-Haghighi, Sara
AU - Singer, Laci M.
AU - Tamang, Sem R.
AU - Findlater, Michael
N1 - Publisher Copyright:
© 2017 Elsevier Ltd
PY - 2018/3/15
Y1 - 2018/3/15
N2 - Using the pincer-ligated iridium fragment [(RPOCOP)Ir] (RPOCOP = 2,6-bis(di-tert-butyl-phosphonito)benzene or 2,6-bis(di-iso-propyl-phosphonito)benzene), a range of complexes with widely varying steric and electronic properties, have been synthesized and studied. The complexes include the novel Ir species (tBuPOCOP)Ir(L) (L = MeCN (2), pyridine (3), 2,4,6-triphenylphosphinine (11)), (iPrPOCOP)Ir(H)(Cl)(L) (L = PPh3 (7), PCy3 (8), 2,4,6-triphenylphosphinine (12)) and (iPrPOCOP)Ir(L) (L = PPh3 (9), PCy3 (10), 2,4,6-triphenylphosphinine (13)). Complex 4, (tBuPOCOP)Ir(PPh3), serves as a convenient source of the latent Ir(I), 14-electron species [(tBuPOCOP)Ir], and is susceptible to ligand exchange chemistry; reactions with MeCN and pyridine afford complexes 2 and 3, respectively. Complexes 11–13 represent rare examples of phosphinine-ligated iridium complexes and are the first examples of any pincer-supported metal complex exhibiting coordination to a phosphinine. The solid-state structure of 11 was determined by single crystal X-ray diffraction studies.
AB - Using the pincer-ligated iridium fragment [(RPOCOP)Ir] (RPOCOP = 2,6-bis(di-tert-butyl-phosphonito)benzene or 2,6-bis(di-iso-propyl-phosphonito)benzene), a range of complexes with widely varying steric and electronic properties, have been synthesized and studied. The complexes include the novel Ir species (tBuPOCOP)Ir(L) (L = MeCN (2), pyridine (3), 2,4,6-triphenylphosphinine (11)), (iPrPOCOP)Ir(H)(Cl)(L) (L = PPh3 (7), PCy3 (8), 2,4,6-triphenylphosphinine (12)) and (iPrPOCOP)Ir(L) (L = PPh3 (9), PCy3 (10), 2,4,6-triphenylphosphinine (13)). Complex 4, (tBuPOCOP)Ir(PPh3), serves as a convenient source of the latent Ir(I), 14-electron species [(tBuPOCOP)Ir], and is susceptible to ligand exchange chemistry; reactions with MeCN and pyridine afford complexes 2 and 3, respectively. Complexes 11–13 represent rare examples of phosphinine-ligated iridium complexes and are the first examples of any pincer-supported metal complex exhibiting coordination to a phosphinine. The solid-state structure of 11 was determined by single crystal X-ray diffraction studies.
KW - Iridium
KW - Ligand exchange
KW - POCOP
KW - Phosphinine
KW - Pincer
UR - http://www.scopus.com/inward/record.url?scp=85029622192&partnerID=8YFLogxK
U2 - 10.1016/j.poly.2017.09.005
DO - 10.1016/j.poly.2017.09.005
M3 - Article
AN - SCOPUS:85029622192
SN - 0277-5387
VL - 143
SP - 126
EP - 131
JO - Polyhedron
JF - Polyhedron
ER -