Tricarbonyl Derivatives of Manganese(I) with Diphosphinite Chelating Ligands |
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Authors: | Jorge Bravo Jesús A Castro Eduardo Freijanes Soledad GarcíaFontn Elvira M Lamas Pilar Rodríguez‐Seoane |
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Institution: | Jorge Bravo,Jesús A. Castro,Eduardo Freijanes,Soledad García–Fontán,Elvira M. Lamas,Pilar Rodríguez‐Seoane |
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Abstract: | Reaction of MnBr(CO)3L] L = Ph2POCH2CH2OPPh2, L1 , {(CH3)2CH}2POCH2CH2OP{CH(CH3)2}2, L2 ] with AgO3SCF3 and AgO2CCF3 in dichloromethane afforded the new complexes Mn(O3SCF3)(CO)3L] and Mn(O2CCF3)(CO)3L], respectively. Substitution of O3SCF3 resulted in the new species Mn(SCN)(CO)3L], Mn(NCCH3)(CO)3L](O3SCF3) and, in the case of L2 , Mn(CN)(CO)3L2]. By contrast, any attempt to displace the O2CCF3 ligand in the same way was unsuccessful. After maintaining for some days the complex Mn(CH3CN)(CO)3L1](O3SCF3) in dichloromethane at room temperature, the new complex MnCl(CO)3L1] was formed. All the new complexes were characterized by elemental analysis, mass spectrometry and IR and NMR spectroscopies. In the case of Mn(O3SCF3)(CO)3L1], Mn(O2CCF3) (CO)3L1], MnCl(CO)3L1], Mn(CH3CN) (CO)3L2] (O3SCF3), Mn(CN)(CO)3L2] and Mn(O2CCF3)(CO)3L2], together with the previously synthesized complex MnBr(CO)3L2], suitable crystals for X‐ray structural analysis were isolated. In all of them the Mn atom adopts six‐coordination by bonding to the three CO ligands, the two P atoms of L and either one C atom (CN), one oxygen atom (O2CCF3, O3SCF3), one N atom (CH3CN, SCN) or the halogen atom (Cl, Br). |
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Keywords: | Manganese Diphosphinite complexes Chelating ligands |
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