Syntheses and catalytic application of hydrido iron(ii) complexes with [P,S]-chelating ligands in hydrosilylation of aldehydes and ketones

Abstract

Four hydrido iron(II) complexes (1-4) with [P,S]-chelating ligands were synthesized by the reactions of (2-diphenylphosphanyl)thiophenols, C 6 H 3 (1-SH) (2-PPh 2 ) (4-R 1 ) (6-R 2 ), abbreviated as (P^SH), with Fe(PMe 3 ) 4 .(1:Among them, complexes 2-4 are new and were completely characterized by spectroscopic methods. The molecular structures of complexes 2, 3, and 4 were confirmed by X-ray single crystal diffraction. The catalytic properties of hydrido iron(II) complexes 1-4 were explored in the hydrosilylation of aldehydes and ketones. They showed a good activity in catalytic hydrosilylation of aldehydes and ketones by using (EtO) 3 SiH as a hydrogen source under mild conditions.

Preparation Of ZnO/Co3O4 Hollow Microsphere By Pollen‐biological Template And Its Application In Photocatalytic Degradation

“…On the other hand, for PEC/TiO 2 , the degradation rate for TC is 85% in 180 minutes, [52] and that of BiOI is 94% in 240 minutes. [53] In the presence of Ag/ZnO/C catalyst, [54] the degradation rate of TC under visible light is 81% at 280 minutes. Compared with the above literatures, the ZnO/Co 3 O 4 hollow microsphere catalysts in this work show high catalytic performance for the degradation of methylene blue and tetracycline, and should be an ideal photocatalyst for the degradation of pollutants in water.…”

Efficient dehydration of primary amides to nitriles catalyzed by phosphorus‐chalcogen chelated iron hydrides

“…Complexes 1 and 2 were prepared according to the method by Klein . Complexes 5 and 6 can be obtained with the method reported in the reference . We disclosed the synthesis of complex 7 in 2017 .…”

“…[26] Complexes 5 and 6 can be obtained with the method reported in the reference. [24] We disclosed the synthesis of complex 7 in 2017. [25] The ligands ortho-diisopropylphosphinophenols were synthesized according to the literature.…”

“…It was confirmed that the hydrido silyl iron complex, [( o ‐Ph 2 P C 6 H 4 Si Me 2 )Fe(H)(PMe 3 ) 3 ], is a good dual catalyst for both hydrosilylation of carbonyl complexes and dehydration of benzamides . In 2015, we prepared [P, S]‐chelated iron hydrides ( 5 and 6 , SCHEME ) and found that they could be used as catalysts for hydrosilylation of aldehydes and ketones . The [P, Se]‐chelated iron hydride ( 7 , Scheme ) was also obtained via Se‐H bond activation .…”

“…[23] In 2015, we prepared [P, S]chelated iron hydrides (5 and 6, SCHEME 1) and found that they could be used as catalysts for hydrosilylation of aldehydes and ketones. [24] The [P, Se]-chelated iron hydride (7, Scheme 1) was also obtained via Se-H bond activation. [25] However, both [P, S]-or [P, Se]-chelated iron hydrides for dehydration of amides to nitriles as catalysts have not been studied.…”