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Silver(I) and Copper(I) Complexes of Semi‐Bulky Nitrogen‐Confused C ‐Scorpionates
Author(s) -
Wang Denan,
Jahan Fathiya,
Meise Kristen J.,
Lindeman Sergey V.,
Gardinier James R.
Publication year - 2020
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.202000173
Subject(s) - chemistry , trifluoromethanesulfonate , steric effects , pyrazole , copper , ligand (biochemistry) , metal , catalysis , acetone , medicinal chemistry , polymer chemistry , nitrogen , styrene , nuclear magnetic resonance spectroscopy , stereochemistry , crystallography , organic chemistry , copolymer , biochemistry , receptor , polymer
Two new sterically demanding nitrogen‐confused C ‐scorpionate ligands with a bis(3,5‐diisopropylpyrazol‐1‐yl)methyl group bound to the 3‐ position of a normal pyrazole ( H L iPr2 ) or an N ‐toluenesulfonyl pyrazole ( Ts L iPr2 ) have been prepared. Reactions between the ligands ( x L iPr2 ) and silver trifluoromethanesulfonate, AgOTf, gave four new compounds of the types [Ag( x L iPr2 )](OTf) (x = Ts, 1a ; x = H, 2a ) or [Ag( x L iPr2 ) 2 ](OTf) (x = Ts, 1b ; x = H, 2b ) depending on the initial metal:ligand ratio. Similarly, the reactions with [Cu(CH 3 CN) 4 ](PF 6 ) produce four new compounds of the type [Cu( x L iPr2 )(CH 3 CN)](PF 6 ) (x = Ts, 3a ; x = H, 4a ) or [Cu( x L iPr2 ) 2 ](PF 6 ) (x = Ts, 3b ; x = H, 4b ). The solid‐state structures of four derivatives ( 1a· acetone, 3a , 3b· CH 2 Cl 2 , and 4b· 2THF) were determined by single‐crystal X‐ray diffraction while all complexes were characterized in CH 3 CN solution by NMR spectroscopy and ESI(+) MS. The eight new complexes catalyze the aziridination of styrene. The copper complexes were generally (but not exclusively) more active catalysts than their silver counterparts.