Coordination chemistry of pyrazole-derived ligands

3-Phenyl-5-(2-pyridyl)pyrazolato Complexes of Lithium, Magnesium, Calcium, and Zinc

“…The ellipsoids represent a probability of 40 %, H atoms are drawn with arbitrary radii. Selected bond lengths (pm): N2-N3 135.1(2), N2-C6 135.3(2), C6-C7 138.2(2), C7-C8 140.8(2), N3-C8 134.4(2), C5-C6 146.6(2), C8-C9 147.4 (2). oxidation states with the main focus on late transition metals such as cobalt [11,12], nickel [12,13], and copper [12,14] as well as molybdenum [10], ruthenium [15,16], palladium [17 -19], and platinum [19,20].…”

Biomimetic Applications of Metal Systems Supported by Scorpionates

“…A structural relationship appears to exist between VFe 3 S 4 clusters and the vanadium site in VFe-proteins (Eady, 1996;Eady, 2003). Far fewer vanadium than molybdenum single cubanes (SC) clusters, containing the [VFe 3 (μ 3 -S) 4 ] core of idealized trigonal symmetry, have been prepared since their inception in 1986-1987(Kovacs & Holm, 1986, and the first and only examples of vanadium edge-bridged double cubanes (EBDC), with the core [V 2 Fe 6 S(μ 3 -S) 6 (μ 4 -S) 2 ] of idealized centrosymmetry, were obtained in 2002 (Zhang et al, 2002). The two cluster types may be generalized as {[HB(pz R ) 3 ]VFe 3 S 4 X 3 } z and {[HB(pz R ) 3 ] 2 V 2 Fe 6 S 8 X 4 } z of variable oxidation level z with diverse scorpionate ligands (hydrotris(pyrazolyl)borate or tris(pyrazolyl)methanesulfonate) bound to the octahedral heterometal site and ligands X (X = phosphine, thiolate, or halide) at the tetrahedral iron sites.…”

Synthesis, Rietveld Refinement and DFT Studies of Bis(4,5-dihydro-1<i>H</i>-benzo[g]indazole)silver(I) Hexafluorophosphate Complex Salt

“…Numerous compounds containing this organic molecule are known to exhibit anti-hyperglycemic, analgesic, anti-inflammatory, antipyretic, antibacterial, antimicrobial, antihypertensive and antidepressant activities [1] [2] [3]. The coordination chemistry of pyrazole derivatives continues receiving considerable attention, due to the ability of these molecules to act as remarkably flexible ligand systems in complexation with a wide range of metal ions [4] [5] [6]. They easily coordinate metal centers through their N2 atoms and also form interesting hydrogen interactions.…”