Tris l-pyrazolyl methane

Tris(l-pyrazolyl)methaneis a white, crystalline compound which is soluble in most organic solvents, but sparingly soluble in hydrocarbons. The ligand is stable in basic and neutral solutions. In acidic protic solvents, decomposition to formic acid and pyrazole occurs readily. The H NMR (80 MHz, CDC13) exhibits signals at 8 6.35 (d of d, 3H, J = 2.5,1.8 Hz), 7.57 (d of d, 3H, J = 2.4, 

---

Cd (and Hg) complexes with bis- and tris(l-pyrazolyl)methanes and -ethanes, as well as with bis(l-triazolyl)methane, have been prepared and studied by conductance measurements (H20, dmso, and dimethylformamide (dmf) solutions), IR, far-IR, H, and 13C NMR spectrometries.203 The Cd halides form complexes of the type [CdLX2] complexes of the types [CdL2](C104)2 and [CdL3](BF4)2 are obtained from the respective Cd salts. 

Nitridoosmium(VI) complexes containing facially coordinated polypyrazolyl ligands have been reported. [Os (N)(tpm)(Cl)2] (47) (tpm = tris(l-pyrazolyl)methane) is prepared in a manner... 

Tris(l-pyrazolyl)methane was first prepared by Hiickel and Bretschneider by the reaction of sodium pyrazolate with chloroform.17 Trofimenko prepared the tris(3,5-dimethyl-l-pyrazolyl)methane by a similar method.2 More recent preparations have utilized both liquid-liquid18 and solid-liquid12 phase-transfer catalysis. The preparation of tris(l-pyrazolyl)methane (E) given below is a modification of the solid-liquid phase-transfer procedure.12... 

Chromium(II) complexes of the ligands l,l -methylenedipyrazole (11 H2Cpz2), l,l -methyl-enebis(3,5-dimethylpyrazole) (12 H2Cdmpz2), tris(l-pyrazolyl)methane (13 HCpz3),10S tris(l-pyrazolylethyl)amine (14 R = H, TPyEA)106,107 and tris(3,5-dimethyl-l-pyrazolylethyl)amine... 

Videla M, Jacinto JS et al (2006) New ruthenium nitrosyl complexes with tris(l-pyrazolyl) methane (tpm) and 2,2 -bipyridine (bpy) coligands. Structure, spectroscopy, and electrophilic and nucleophilic reactivities of bound nitrosyl. Inorg Chem 45 8608-8617... 

---