ABSTRACT
The caesium salt of dimethyl-N-benzoyl-amido-phosphate, namely, aqua-[di-meth-yl (N-benzoyl-amido-κO)phospho-nato-κO]caesium, [Cs(C9H11NO4P)(H2O)] or CsL·H2O, is reported. The compound crystallizes in the monoclinic crystal system in the P21/c space group and forms a mono-periodic polymeric structure due to the bridging function of the dimethyl-N-benzoyl-amido-phosphate anions towards the caesium cations.
ABSTRACT
In the title compound, C16H17NO4, the dihedral angle between benzene rings is 72.7â (2)°. The meth-oxy groups are rotated by 2.4â (2) and -4.9â (2) (benzil-idene moiety) and by 5.6â (3)° (aniline moiety) relative to the adjacent benzene ring. In the crystal, the mol-ecules are linked into chains along [101] through C-Hâ¯O and O-Hâ¯N hydrogen bonds.
ABSTRACT
A series of complexes Ln(Pip)3(Phen) (Ln(iii) = La, Ce-Nd, Sm-Lu, Y; HPip (CAPh type ligand) = 2,2,2-trichloro-N-(dipiperidin-1-yl-phosphoryl)acetamide, Phen = 1,10-phenanthroline) has been synthesized. The lanthanum(iii) doped europium(iii) complexes ([LaxEu1-x(Pip)3(Phen)], x = 0.99, 0.95, 0.50) have been obtained by the co-crystallization method. The complexes have been characterized by means of X-ray diffraction, IR, (1)H and (31)P-NMR and absorption spectroscopy. Emission and excitation luminescence spectra were recorded at 295 and 77 K. The lifetime values (τ) for the emission of all europium complexes were determined. The (5)D0 luminescence quantum efficiency is 73-89%. The symmetries of the nearest europium surrounding in pure and doped complexes were evaluated from the Stark splitting of (5)D0-(7)FJ transitions. Crystal structures of [Ln(Pip)3(Phen)] (Ln = Nd (1), Eu (2) and Tb (3)) have been determined. Lattice parameters of the [Ln(Pip)3(Phen)] (Ln = Tb, Yb) and the doped [LaxEu1-x(Pip)3(Phen)] (x = 0.99, 0.95, 0.50) complexes have been measured. The presence of four polymorphs within a number of rare earth elements has been estimated: two in triclinic (Ln1 = La, Nd; Ln2 = Eu), one in the monoclinic (Ln3 = Tb) and one in the rhombic (Ln4 = Tb, Yb) symmetry. Complex 3 can be obtained in two crystal modifications: monoclinic and orthorhombic ones.
ABSTRACT
In the molecular structure of the title compound, [NaNi(C18H18N2O4)(NO3)(CH3OH)], the Ni(2+) ion has a slightly distorted square-planar coordination environment defined by two N and two O atoms which belong to a Schiff base ligand, viz. 6,6'-dimeth-oxy-2,2'-[ethane-1,2-diylbis(nitrilo-methanylyl-idene)]diphenolate. Seven O atoms form the coordination environment of the Na(+) ion: four from the Schiff base ligand, two from a bidentate chelating nitrate anion and one O atom from a coordinating methanol mol-ecule. In the crystal, the bimetallic complexes are assembled into chains along the b-axis direction via weak C-Hâ¯O hydrogen-bond inter-actions. Neighbouring chains are in turn connected through bifurcated O-Hâ¯O hydrogen bonds that involve the coordinating methanol mol-ecules and the nitrate anions, and through π-π stacking inter-actions between phenyl rings of neighbouring mol-ecules.
ABSTRACT
In the title complex, [Cu(C8H11NO5PS)(C18H15P)2], the Cu(I) ion is coordinated by two tri-phenyl-phosphane mol-ecules and two O atoms of the chelating dimeth-yl(phenyl-sulfon-yl)amido-phosphate anion, generating a squashed CuO2P2 tetrahedron. In the six-membered chelate ring, the Cu, P and O atoms are almost coplanar (r.m.s. deviation = 0.024â Å), with the N and S atoms displaced in the same direction, by 0.708â (5) and 0.429â (2)â Å, respectively.
