In the title compound, [Ni(C24H36P3)Cl], the Ni(II) atom adopts a distorted square-planar geometry with the two neutral P atoms of the tridentate ligand trans to one another. Bond lengths and angles of the phosphide P atom feature a pyramidal geometry of the donor atom, which forms a single bond with the Ni(II) atom, retaining a stereochemically active lone pair.

In the title compound, [Cu(C(13)H(17)BrClN(2)O)(NCS)], the Cu atom is in a slightly distorted square-planar geometry, coordinated by the three donor atoms of the ligand and the N atom of the isothio-cyanate group.

The title compound, C(7)H(6)BrN(3), crystallizes with three independent mol-ecules in the asymmetric unit. The mol-ecules are approximately planar (r.m.s. deviations for all non-H atoms = 0.016, 0.023 and 0.024 Å). The primary amine groups show pyramidal coordination. In the crystal, adjacent mol-ecules are linked by N-H⋯N hydrogen bonds. For two independent mol-ecules, the amine groups are hyd...

The organogermanium chemistry covers huge fields, as shown by a survey covering the crystallographic and structural data of over four hundred and fifty examples. Over 10 percent of those compounds exist as distortion isomers (around 97 %) and ligand isomers (around 3 %). These are discussed in term of coordination around the Ge(II), Ge(IV) and Ge2 +3 atoms, and correlations are drawn between do...

The overall mol-ecular geometry of the title compound, C(11)H(12)N(4)O(3)S, is bent, with a dihedral angle of 89.24 (5)° between the best planes through the two aromatic rings. Each mol-ecule behaves as a hydrogen-bond donor toward three different mol-ecules, through its amidic and the two aminic H atoms, and it behaves as a hydrogen-bond acceptor from two other mol-ecules via one of its sulfon...

In the title mixed solvate, [Au(2)Fe(C(17)H(14)P)(2)Cl(2)]·CHCl(3)·0.5CH(3)(CH(2))(4)CH(3), the hexane solvent mol-ecule is disposed about an inversion centre. The Au atoms exist within nearly ideal linear coordination defined by P,Cl-donor sets, and when viewed down the P⋯P axis the Au atoms are gauche to each other. In the crystal structure, the chloro-form solvent mol-ecule is associated wit...

Structural and electronic features of the novel title sulfur-oxygen donor ligand Me(2)pipto (1), are discussed in comparison with those of the corresponding dithione ligand Me(2)pipdt. A tuning of the electronic and coordination properties of the ligand, relatable to the soft/hard power of the donor atoms, is achieved. Coordination properties have been checked towards Ni(II) and Fe(III) cations...

In the crystal structure of the title salt, C(5)H(6)ClN(2) (+)·C(7)H(5)O(3) (-), the protonated N atom and the 2-amino group of the cation are hydrogen bonded to the carboxyl-ate O atoms via a pair of N-H⋯O hydrogen bonds, forming R(2) (2)(8) ring motifs. These motifs are centrosymmetrically paired via N-H⋯O hydrogen bonds, forming a complementary donor-donor-acceptor-acceptor (DDAA) array. A t...

Macrocyclic complexes and their chemistry is a growing area of research in inorganic and bioinorganic chemistry in point of its biological significance [1]. Macrocyclic complexes have also received special attention because of their mixed soft –hard donor acceptor character and versatile coordination behavior and their pharmacological properties [2]. Macrocyclic ligands and complexes have versa...

Evidence from a variety of spectroscopic probes indicates that (phi, psi) values corresponding to the left-handed polyproline II helix (P(II)) are preferred for short alanine-based peptides in water. On the basis of results from theoretical studies, it is believed that the observed preference is dictated by favorable peptide-solvent interactions, which are realized through formation of optimal ...