Synthesis, Characterization, and Catalytic Applications of Palladacyclic Complexes Bearing C,N,S‐Donor Ligands

Abstract

The preparations of novel tridentate C,N,S-donor ligand precursors, PhN=C(CMe 2 )(NPh)C=N(CH 2 ) 2 SR [R = CMe 3 (2); R = Ph (3)] are described. Treatment of 2 and 3 with 1 equiv. of Pd(OAc) 2 affords the orthometallated palladium(II) complexes [PhN=C(CMe 2 )(N-η 1 -Ph)C=N(CH 2 ) 2 SR]Pd(OAc) [R = CMe 3 (4); R = Ph (5)]. Reaction of 4 and 5 with an excess of LiCl in methanol affords the orthometallated palladium(II)[a] 4642 complexes [PhN=C(CMe 2 )(N-η 1 -Ph)C=N(CH 2 ) 2 SR]PdCl [R = CMe 3 (6); R = Ph (7)]. Crystal structures are reported for compounds 3 and 4. The application of these novel palladacyclic complexes as catalyses for the Suzuki and Heck reactions with aryl halide substrates was examined. (

A New Type of Dye‐Sensitized Solar Cell with a Multilayered Photoanode Prepared by a Film‐Transfer Technique

“…[ 16 ] It is known that zinc phthalocyanine with multiple and symmetrical carboxyl groups is relatively easy to synthesize; however, it is unfavorable for linking with the semiconductor. [ 17 ] Therefore, we designed and synthesized an unsymmetrical ZnPc with a single carboxyl group, and it was expected to have a better directionality in electronic coupling with a semiconductor and good solubility. [ 18 ] The maximal absorption peaks of the two dyes mentioned above in solution were at 472 nm and 675 nm, respectively ( Figure S2, Supporting Information).…”

σ‐Alkylpalladium Intermediates in Intramolecular Heck Reactions:Isolation and Catalytic Activity

“…[23a] However, its behavior towards 4-bromoanisole (entry 9) is similar to that of sulfur- [18,28] or hydrazone-containing [29] palladacycles as well as imine-based palladium complexes. [20] The behavior of indolyl complex 13 b was very similar to that of 2 b (entries 3 and 5).…”

Graphene oxide with covalently attached zinc monoamino-phthalocyanine coated graphite electrode as a potentiometric platform for citrate sensing in pharmaceutical preparations

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