Syntheses and coordination studies of 2-(diphenylphosphinomethyl)pyridine N,P dioxide with Co2+, Ni2+, Cu2+ and Zn2+ tetrafluoroborate

Steric and electronic control over the structural diversity of N-(n-pyridinyl) diphenylphosphinic amides (n = 2 and 4) as difunctional ligands in triphenyltin(iv) adducts

“…The coordination polyhedra of tin can be described as distorted trigonal bipyramid (three phenyls equatorial, chlorine and the phosphoryl at the apices). The trans angles around tin are Cl1-Sn1-O1 ¼ 178.21 (5) and Cl2-Sn2-O2 ¼ 176.99(4) , and the sum of angles in the trigonal girdle around Snare 358.66 (C 1 ) and 358.16 (C 1 0…”

“…The development of well-designed ligand systems with which the properties of their complexes can be easily varied in a controlled manner is one of the most important goals in modern inorganic and organometallic chemistry. Among the many ligand systems in the literature, heterodifunctional ligands [1][2][3][4][5][6][7][8] are intensively studied and applied owing to the oen unique properties of their metal complexes. The coordination chemistry of such ligands, capable to realize different binding modes with metal centers, 9 is interesting for synthesis of new selective complexing agents and analytical reagents.…”

Reaction-controlled assemblies and structural diversities of seven Co(ii)/Cu(ii) complexes based on a bipyridine-dicarboxylate N-oxide ligand

“…20 The O axis -Co1-O axis (180°) and N axis -Co2-N axis (180°) axial angles are linear, which means that no appreciable distortion in the Z axis is observed and indicates that such a d 7 octahedral complex has a high-spin system. 21 In 1, each (R,S)-bpdado ligand employs a tridentate coordination mode to link three metal Co centers (two Co1 and one Co2) by utilizing two carboxylic groups and two N-oxide CrystEngComm Paper groups (Table 1a). Two N-oxide atoms connect one Co2 in the bis-chelating mode to generate a seven-membered ring, and each carboxylic group, adopting a μ 1 -η 1 :η 0 bridging mode, connects a Co1 atom to generate a ijCo1IJR-bpdado)] n or ijCo1IJS-bpdado)] n helical chain, namely, a left-or right-handed helix propagating along the c axis with a 2 1 screw axis and a pitch of 7.489(9) Å (Fig.…”