Novel Cyclometallated Complexes Derived From a Halogenated Thiosemicarbazone. Crystal and Molecular Structures of 2‐FC6H4C(Me)=NN(H)C(=S)NHPh and
[(Pd{2‐FC6H3C(Me)=NN=C(S)NHPh})2(μ‐PPh2(CH2)2PPh2)] |
| |
Authors: | Luis A Adrio Adriana Amoedo Jos M Antelo Jesús J Fernndez Javier Martínez Juan M Ortigueira M Teresa Pereira Jos M Vila |
| |
Institution: | Luis A. Adrio,Adriana Amoedo,José M. Antelo,Jesús J. Fernández,Javier Martínez,Juan M. Ortigueira,M. Teresa Pereira,José M. Vila |
| |
Abstract: | Treatment of the thiosemicarbazone 2‐FC6H4C(Me)=NN(H)C(=S)NHPh, a , with palladium(II) acetate in acetic acid, or with lithium tetrachloropalladate(II) in methanol, gave the tetranuclear cyclometallated complex Pd{2‐FC6H3C(Me)=NN=C(S)NHPh}]4 (1a) . Reaction of 1a with the diphosphines Ph2P(CH2)2PPh2 (dppe), Ph2PCH=CHPPh2 (trans‐dpe) Ph2P(CH2)3Ph2 (dppp) or Ph2P(CH2)4Ph2 (dppb) in a 1:2 molar ratio gave the dinuclear cyclometallated complexes (Pd{2‐FC6H3C(Me)=NN=C(S)NHPh})2(μ‐Ph2P(CH2)nPPh2)], (n = 2, 2a ; 3, 4a ; 4, 5a ) and (Pd{2‐FC6H3C(Me)=NN=C(S)NHPh})2(μ‐Ph2PCH=CHPPh2)], ( 3a ). The X‐ray crystal structure of ligand a and of complex 2a are described. The structure of complex 2a shows the palladium atom is bonded to four different donor atoms: C, N, S and P. |
| |
Keywords: | Cyclometallation C‐H activation Palladium Thiosemicarbazones |
|
|