Five complexes containing N , N -bis(2-hydroxyethyl)-ethylenediamine with tetracyanidopalladate(II): synthesis, crystal structures, thermal, magnetic, and catalytic properties.

Five cyanide complexes, [Ni(N-bishydeten)Pd(CN)4] (1), [Cu(N-bishydeten)Pd(μ-CN)2(CN)2]n(2), [Cu(N-bishydeten)2][Pd(CN)4] (3), [Zn(N-bishydeten)Pd(CN)4] (4), and [Cd(N-bishydeten)2][Pd(CN)4] (5) (N-bishydeten=N,N-bis(2-hydroxyethyl)-ethylenediamine), have been synthesized and characterized using various techniques. Different structures were formed when the M : L ratio was varied in copper complexes. The single-crystal X-ray diffraction analysis reveals that2, a 1-D cyanide-bridged complex with 2,2-CT-typezigzagchain, was obtained by using 1 : 1 M : L ratio whereas3was formed as a complex salt in a molar ratio of 1 : 2. The thermal stabilities determined from DTGmaxvalues of the first decomposition stages change in the order1 > 5 > 4 > 3 > 2. Although an EPR signal was not observed for1, thegparameters obtained from the EPR spectra of2and3indicate that CuIIions are located in tetragonally distorted octahedral sites (D4h), and the ground state of the unpaired electron is(2B1g). The magnetic behavior indicates a very small antiferromagnetic interaction below 10 K for1–3. In3, there is a temperature-independent paramagnetism (α) due to the orbital moments of thedelectrons.1–3were tested as catalysts in Suzuki and Heck coupling reactions. [ABSTRACT FROM AUTHOR]