Original Title:
Σύνθεση, χαρακτηρισμός και μελέτη της καταλυτικής δραστικότητας συμπλόκων Ni(II) και Au(I) με υποκαταστάτες τύπου Ρ-Ν-Ρ και (Ρ,Ρ)
Translated title:
Synthesis, characterization and study of catalytic activity of Ni(II) and Au(I) complexes with P-N-P and (P,P) ligands.
Summary:
In this thesis, the aim was to employ bidentate ligands of
phosphorus-nitrogen-phosphorus (P-N-P) and phosphorus-phosphorus type (P,P), in
order to prepare mononuclear [NiII(P,P)X2], X = Cl, Br, and dinuclear
[Au(I)2(PNP)X2] type of complexes, PNP = Ph2PN(R)PPh2, R = H, CH(CH3)Ph,
(CH2)3Si(OCH3)3. By the (P,P) notation we refer to the
2,2-diphenylphosphino-1,1-biphenyl ligand. The ligands and the complexes were
characterized by infrared (IR) and nuclear magnetic resonance (NMR)
spectroscopies. In addition, the crystal structure of [Ni(P,P)Br2] was
determined by X-ray crystallography. The catalytic activity of the Au(I)
complexes was studied in hydroalkoxylation reactions, whereas that of
[Ni(P,P)X2], X = Cl, Br, in polymerization of norbornene, as well as in Kumada
and Suzuki CC coupling reactions. The [NiII(P,P)Cl2] complex, under the
experimental conditions employed, is catalytically inactive in Suzuki coupling
reactions. On the other hand, the Au(I) complexes showed a satisfactory
catalytic activity in hydroalkoxylation reactions. Last, the catalytic activity
of [Ni(P,P)Br2] in Kumada coupling reactions is promising.
Keywords:
Aminobiphosphine ligands, Ni(II) and Au(I) complexes, Catalytic cross-coupling reactions, Homogenous catalysis
