Synthesis and characterization of a series of diphenyldipyrazolylmethane complexes with zinc(II)

Pyridazine‐Based Ligands and Their Coordinating Ability towards First‐Row Transition Metals

“…The coordinated nitrate ions feature oxygen-metal-oxygen angles of 53.30 (9), 53.87 (6), 56.73 (10), and 61.25° (8), which are similar to values reported in the literature. [46] Ligand exchange reactions employing metal halide or pseudo-halide precursors are known to lead preferably to complexes of the type metal/ligand = 1:1, [19][20][21][22] whereas employing precursors with noncoordinating counterions leads to complexes of the type 2:1. [18,[24][25][26] Nitrate precursors seem to exhibit reactivity at the borderline, enabling both stoichiometries.…”

Bis(imidazole-κN3)bis(nitrato-κO)zinc(II)

“…The angles O4-Zn-N5 and O1-Zn-O4 are reduced while all the others angles are increased in comparison with the ideal tetrahedral angle of 109.5° (Li et al, 2007) The values of Zn-N distances, 2.011 (3) and 2.015 (3) Å, are little far to that found for tris(2-ethyl-1H-imidazole-κN 3 )(terephthalato-κO)zinc(II) (Xie et al 2009) and bis(1H-imidazole (He et al 2007). The Zn-O coordinating distances of 1.966 (4) and1.999 (3) Å are comparable of those found in diphenyldipyrazolylmethane complexes with zinc(II) (Shaw et al 2009). Table 2.…”

[Diphenyldi(pyrazol-1-yl)methane]dinitratocobalt(II)

“…For related structures incorporating diphenyldipyrazolylmethane ligands, see: Shiu et al (1993); Tsuji et al (1999); Reger et al (2004); Shaw et al (2004Shaw et al ( , 2005Shaw et al ( , 2009; Baho & Zargarian (2007a,b).…”

“…Similar complexes with Pd II were synthesized by Tsuji et al (1999) and Reger et al (2004) who generated complexes with Ag I . More recently, compounds with diphenyldipyrazolylmethane ligands complexed with Cu I/II (Shaw et al 2004;2005), Ni II (Baho & Zargarian, 2007a;2007b), and Zn II (Shaw et al 2009) have appeared in the literature.…”