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- Title
Acid form of Trofimenko's scorpionates, H(Tp<sup>R,R′</sup>); comments on synthesis and solid-state structure of H(Tp<sup>tBu,Me</sup>)<sup>†</sup>.
- Authors
Saliu, Kuburat O.; Cheng, Jianhua; McDonald, Robert; Takats, Josef
- Abstract
We report a re-examination of Trofimenko's original protocol for the preparation of the acid form of his hydrotris(pyrazolyl)borates, H(TpR,R′), by the treatment of M(TpR,R′) with glacial acetic acid. It is concluded that the protocol is effective as long as the 3-substituent of the pyrazolyl moiety is sufficiently bulky to provide steric protection to the acidic N–H proton. The solid-state structure of H(Tp t Bu,Me), the acid form of the popular Tp t Bu,Me ligand is also presented. Trofimenko's original protocol (aqueous KTpR,R′/glacial acetic acid) is a suitable method to obtain the acid form of various scorpionate ligands as long as the pyrazolyl ring 3-substituent provides sufficient steric protection to the acidic N–H proton of H(TpR,R′); structure of H(Tp t Bu,Me)
- Subjects
SCORPIONATES; ACETIC acid; ACIDS; BORATES; PORPHYRAZINES
- Publication
Australian Journal of Chemistry, 2022, Vol 75, Issue 8/9, p566
- ISSN
0004-9425
- Publication type
Article
- DOI
10.1071/CH21305