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Potassium trispyrazolylborate

Potassium trispyrazolylborate, commonly abbreviated KTp, is the potassium salt with the formula :. This salt is the source of the trispyrazolylborate ligand.

KTp is a white crystalline solid that is soluble in polar solvents, alcohols, and water. The synthesis of KTp involves potassium borohydride and pyrazole without a solvent. :

Idealized structure of a Tp ligand bound to a metal center ML<sub>n</sub>.

The tris(pyrazolyl)borate forms octahedral coordination compounds with the formula M[Tp]2 with first row transition metals. KTp also forms 1:1 complexes, for example it can be converted to K[TpMo(CO)3]; :

When K[TpMo(CO)3] is treated with butyl nitrite it yields the neutral orange complex TpMo(CO)2NO. :K[TpMo(CO)3]+ BuONO→TpMo(CO)2NO+CO+KOBu

References

(1967). "Boron-pyrazole chemistry. II. Poly(1-pyrazolyl)-borates". [[J. Am. Chem. Soc.]].
(1970). "Inorganic Syntheses".
(1999). "Scorpionates: Polypyrazolylborate Ligands and Their Coordination Chemistry.". [[World Scientific Publishing Company]].

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potassium-compounds boron-compounds pyrazoles

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