Zorica Leka

1-Ferrocenyl-3-(4-methyl­anilino)propan-1-one

In the title ferrocene derivative, [Fe(C5H5)(C15H16NO)], the dihedral angle between the best planes of the benzene and the substituted cyclopentadienyl ring is 83.4 (1)°. The presence of a methyl substituent in the para position of the aniline group does not alter the crystal packing compared to that of 3-anilino-1-ferrocenylpropan-1-one [Leka et al. (2012 ▶). Acta Cryst. E68, m229]. The molecules are connected into centrosymmetric dimers via N—H⋯O hydrogen bonds. In addition, C—H⋯O and C—H⋯N contacts stabilize the crystal packing.

3-Anilino-1-ferrocenylpropan-1-one

In the title ferrocene derivative, [Fe(C5H5)(C14H14NO)], the dihedral angle between the mean planes of the phenyl ring and the substituted cyclopentadienyl ring is 84.4 (1)°. The molecules are connected into centrosymmetric dimers via N—H⋯O hydrogen bonds. In addition, C—H⋯O and C—H⋯N contacts stabilize the crystal packing.

1-Ferrocenyl-3-(3-fluoro-anilino)propan-1-one.

The title ferrocene derivative, [Fe(C5H5)(C14H13FNO)], crystallizes in the same space group with similar unit-cell parameters as the derivatives 3-anilino-1-ferrocenylpropan-1-one [Leka et al. (2012 ▶). Acta Cryst. E68, m229] and 1-ferrocenyl-3-(4-methylanilino)propan-1-one [Leka et al. (2012 ▶). Acta Cryst. E68, m230]. The dihedral angle between the best planes of the benzene ring and the substituted cyclopentadienyl ring is 83.4 (1)°. The presence of the electronegative fluoro substituent in the meta position of the aniline group does not alter the crystal packing compared to the other two derivatives. The molecules are connected into centrosymmetric dimers via N—H⋯O hydrogen bonds. In addition, C—H⋯O and C—H⋯N contacts stabilize the crystal packing.

Benzyl 2-(benzylsulfanyl)benzoate.

In the title compound, C21H18O2S, the central aromatic ring makes dihedral angles of 5.86 (12) and 72.02 (6)° with the rings of the terminal O-benzyl and S-benzyl groups, respectively. The dihedral angle between the peripheral phenyl rings is 66.16 (6)°. In the crystal, molecules are linked by pairs of C—H⋯O hydrogen bonds, forming inversion dimers. These dimers are linked via C—H⋯π interactions, forming a three-dimensional network.

4-[(4-Methyl-phen-yl)sulfan-yl]butan-2-one.

In the title compound, C11H14OS, all non-H atoms are essentially coplanar, with a mean deviation of 0.023 Å. In the crystal, centrosymmetrically related molecules are weakly connected into dimers by pairs of C—H⋯O interactions. The dimers are further linked along the a axis by weak C—H⋯π and C—H⋯S interactions.

4-Eth­oxy-3-meth­oxy­benzaldehyde

In the title compound, C10H12O3, all non-H atoms are approximately coplanar, with an r.m.s. deviation of 0.046 Å. In the crystal, very weak C—H⋯O interactions link the molecules into sheets parallel to (101).

In situCoIIoxidation upon coordination to the dithiocarbamate derivative

Dithiocarbamate derivatives, besides other industrial applications, are used for many years now as powerful fungicides and pesticides. [1] Complexes of Co(II) and Co(III) with our, previously reported, biologically active ligand, N,N-diacetato-N-dithiocarbamate (dadtc 3) (1) [ 2 ] were prepared and characterized by classical physico-chemical methods, with the aim of enhancing the already intriguing fungicidal activity of the ligand itself. Anionic Co(II) complex [Co2(H2dadtc)5] − (2), obtained by a simple addition of the acidic ligand solution to the aqueous solution of [Co(H2O)6]Cl2 at RT, undergoes, in presence of air, over several days, spontaneous Co(II) oxidation to the Co(III) state, followed by an overall chemical rearrangement, resulting in the formation of the molecular Co(III) complex 3. Complex 2 reveals a binuclear structure where two hexacoordinated cobalt(II) centres (CoA and CoB) are presumably doublebridged by two sulfur atoms from two ligand molecules. Remaining two sulfurs of these ligand molecules both coordinate the CoB centre. Its octahedral coordination sphere is completed by two sulfurs from the CSS group of the third ligand molecule. CoA is also bound to four sulfurs from remaining two ligand molecules. Formation of the anionic species (2) was undoubtly proven by MALDI TOFF analysis. Magnetic measurements revealed a strong antiferromagnetic coupling of two neighbouring paramagnetic Co(II) centres, suggesting the double bridged arrangement as described here and by others.[3] The elemental analysis is in a very good agreement with NH4 +

1-Ferrocenyl-3-(2-methyl­anilino)propan-1-one

In the ferrocene-containing Mannich base, [Fe(C5H5)(C15H16NO)], the dihedral angle between the mean planes of the benzene ring and the substituted cyclopentadienyl ring is 84.63 (7)°. The conformation of the title compound significantly differs from those found in corresponding m-tolylamino and p-tolylamino derivatives. In the crystal, C—H⋯O interactions connect the molecules into chains, which further interact by means of C—H⋯π interactions. It is noteworthy that the amino H atom is shielded and is not involved in hydrogen bonding.

Aging Effects in Cu-Zn-Al Shape Memory Alloy

The effects of quenching and aging treatments on the structure, properties and precipitation kinetics in a Cu-22.3Zn-5.1Al (wt%) shape memory alloy have been investigated. The martensitic transformation temperature, MS, during isothermal aging from 200 to 400 0 C decreases with aging time at each aging temperature. Aging at 400 0 C significantly reduces the tensile ductility and yield strength of this alloy. The periods of isothermal aging required to initiate precipitation of -phase have been examined at various temperatures, and a time-temperature-transformation (TTT) diagram is drawn. The apparent activation energy estimated from the loss of shape memory recovery is similar to the activation energy of -precipitation in the alloy.

The Effect of Heat Treatment on the Martensitic Transformation and Properties of Cu-Zn-Al Alloy

The effects of various quenching treatments including direct quenching, up-quenching, step-quenching in boiling water and step-quenching in an oil bath were studied on a Cu-20.8Zn-5.8Al (mass%) shape memory alloy. The aging behaviors of variously quenched specimens have also been investigated. The thermally recoverable martensitic deformation in quenched specimens was determined to be up to 3.2%. The yield stress and transformation temperatures were decreased during aging compared to quenched specimens. In addition, aging resulted in a degradation and ultimate loss of the shape memory capacity. The apparent activation energies of the alloy obtained from loss of shape memory and decrease in the transformation temperatures were ranged from 64 to 74 kJmol·. The life expectancy predictions indicate that devices made from the alloy will lose their shape memory capability after exposure at 373 Κ for time ranged from 52 to 60 days. However, relatively long memory life is expected at temperatures below 323 K.