On the Immobilization of a Monophosphaferrocene on a Silica Support

Abstract

Reactions of 2-formyl-3,4-dimethyl-1-phosphaferrocene with aminopropyl (AP) functionalized hexagonal mesoporous silica (HMS) were studied in the absence and presence of an excess of the mild reducing agent Na[BH 3 CN]. Starting material and reaction products were characterized by analytical and multinuclear ( 13 C, 29 Si, 31 P) MAS NMR spectroscopic data. Both reactions proceeded by partial derivatization of surface-bound NH 2 groups to yield products with tethered phosphaferrocene units. Evaluation of spectroscopic data and the results of homogeneous model reactions confirmed that condensa-

Synthesis, Structure, and Electrochemical Properties of 2,3,4,5-Tetraphenyl-1-Monophosphaferrocene Derivatives

“…Phosphaferrocenes are commonly regarded as phosphorus ligands with weaker σ-donor properties than classical tertiary phosphines and stronger π-acceptor ability similar to that of phosphites P(OR) 3 [ 6 ]. From a practical standpoint, monophosphaferrocenes have been utilized as chiral ligands in homogeneous and asymmetric catalysis [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ], as building blocks for multidentate ligand systems [ 15 , 16 , 17 , 18 ], and as functional materials for self-assembled monolayers [ 19 , 20 ].…”