1369321-12-9

Upstream product

• 1369321-08-3 [(μ-SCH2)2CH(OCH2Ph)]Fe2(CO)4(PPh3)2 
• 594-09-2 trimethylphosphane 

Relevant academic research and scientific papers

Synthesis, characterization, and electrochemical properties of benzyloxy-functionalized diiron 1,3-propanedithiolate complexes relevant to the active site of [FeFe]-hydrogenases

A series of new benzyloxy-functionalized 1,3-propanedithiolate (PDT)-type model complexes (A and 1-7) have been synthesized and structurally characterized. The benzyloxy-functionalized all-carbonyl complex [(ν-SCH 2)2CH(OCH2Ph)]Fe2(CO)6 (A) can be prepared by condensation reaction of 2-benzyloxy-1,3-dibromopropane with the in situ generated (ν-LiS)2Fe2(CO)6, whereas it reacts with the in situ formed N-heterocyclic carbene 1-mesityl-3-methylimidazol-2-ylidene (IMes/Me) to give the corresponding carbene monosubstituted complex [(ν-SCH2) 2CH(OCH2Ph)]Fe2(CO)5(I Mes/Me) (1). The PMe3-monosubstituted complex [(ν-SCH2)2CH(OCH2Ph)]Fe2(CO) 5(PMe3) (2) can be prepared by substitution of the CO ligand in parent complex A with 1 equiv of PMe3 in the presence of Me3NO·2H2O, whereas PPh3-monosubstituted and PPh3-disubstituted complexes [(ν-SCH2) 2CH(OCH2Ph)]Fe2(CO)5(PPh 3) (3) and [(ν-SCH2)2CH(OCH 2Ph)]Fe2(CO)4(PPh3)2 (4) are prepared by reaction of A with 2 equiv of PPh3 under similar conditions. While the PPh3-disubstituted complex 4 can also be prepared by treatment of 3 in MeCN with 2 equiv of PPh3 in the presence of Me3NO·2H2O, treatment 4 with 2 equiv of PMe3 in refluxing toluene afforded unexpected PPh 3/PMe3-disubstituted complex [(ν-SCH2) 2CH(OCH2Ph)]Fe2(CO)4(PPh 3)(PMe3) (5). Particularly interesting is that although the reaction of A with 1 equiv of diphosphine dppe in refluxing toluene affords the dppe-chelated single-butterfly complex [(ν-SCH2) 2CH(OCH2Ph)]Fe2(CO)4(dppe) (6), treatment of A in MeCN with 1 equiv of dppe in the presence of Me 3NO·2H2O results in formation of the dppe-bridged double-butterfly complex {[(ν-SCH2)2CH(OCH 2Ph)]Fe2(CO)5}2(dppe) (7). All new model complexes have been chatacterized by elemental analysis, spectroscopy, and particularly for 1 and 4-7 X-ray crystallography. Furthermore, complexes A, 3, and 4 have been found to be catalysts for HOAc proton reduction to H2 under electrochemical conditions.