The use of iron as a replacement for noble metals in photochemical and photophysical applications is challenging due to the typically fast deactivation short-lived catalytically active states. Recent success cyclometalated iron(III) complex utilizing bis-tridentate ligand motif inspired phenyl-1H-pyrazole bidentate ligand. Five complexes using tris(1-phenylpyrazolato-N,C2)iron(III) scaffold are...

Palladium complexes of two new types of unsymmetrical pyridyl-supported pyrazolyl-N-heterocyclic carbene ligands were synthesized and structurally characterized. A strategy to release the steric strain of the ligand was realized by the introduction of methylene linkers to the ligand molecule. All the palladium complexes exhibited good to excellent catalytic activity in Suzuki-Miyaura reactions ...

A series of Cu(II), Co(II), and Zn(II), mononuclear Schiff base complexes were studied characterized by DFT calculations. The ligand was derived from the experiment condensing 5-acetyl-4-hydroxy-2H-1,3-thiazine-2,6(3H)-dione with o-phenylenediamine. has coordination sites on phenolic oxygen, azomethine nitrogen, amino group where it behaves as a monobasic tridentate. All structure constructed b...

A new class of tridentate pyridine-bis(oxazoline) ligand having gem-diphenyl groups at C5 of the oxazoline rings has been developed. Its metal complex exhibited high catalytic efficiency in asymmetric synthesis. We have shown that gem-diphenyl groups at C5 of the oxazoline rings are essential for getting high enantiomeric excess.

An unusual example of diastereoselectivity has been observed in Cu(κ(3)-P,C,P'-1)X complexes where 1 is an asymmetric tridentate ligand containing a bicyclic NHC framework and X is a halide. When X is Cl(-), the S(Cu) isomer is formed selectively whereas when X = I(-) the R(Cu) diastereomer is preferred.

The Sn atom of the title compound, [Sn(C(2)H(5))(2)(C(12)H(12)BrNO(3))], is in a distorted SnNC(2)O(2) trigonal-bipyramidal geometry and forms five- and six-membered chelate rings with the tridentate ligand. One C atom of one ethyl group is disordered with site occupancies of 0.61 (3):0.39 (3).

In the title complex, [Mn(C₆H₂N₃O₇)₂(C₃₀H₂₆N₄O)], the Mn(II) atom is coordinated by the tridentate bis-benzimidazole ligand and two atoms of the picrate anions, in a distorted square-pyramidal geometry (τ = 0.038). One nitro O atom of one picrate ion is disordered over two sites with occupancies of 0.54 (5) and 0.46 (5).

In the title complex, [Cu(NCS)(2)(C(16)H(19)N(3))], the Cu(II) atom is coordinated by a total of four N atoms; three from one tridentate Schiff base ligand and one from one of the NCS(-) ions. The S atom from the other NCS(-) ion completes the distorted square-pyramidal coordination.

A new tetrakis(pyrazolyl)borate ligand bearing triphenylphosphine oxide moieties appended to the 3-position of the pyrazolyl rings is reported and shown to display varied coordination chemistry from tridentate N(2)O coordination with thallium to hexadentate N(3)O(3) coordination with europium.

In the title mononuclear Cd(II) complex, [CdCl(2)(C(11)H(17)N(3))], the Cd(II) atom is coordinated by two Cl atoms and three N atoms from the tridentate Schiff base ligand in a distorted square-pyramidal environment. The three N atoms and one Cl atom constitute the base of the pyramid, whereas the other Cl atom occupies the apical position.