[Hydrotris(3-isopropyl-5-methylpyazolyl)borato]-iodocobalt(II): Unusual purification by {open_quotes}inverse recrystallization{close_quotes}

Journal Article · Wed May 11 04:00:00 EDT 1994 · Inorganic Chemistry

DOI:https://doi.org/10.1021/ic00088a038· OSTI ID:450861

Reinaud, O M; Rheingold, A L; Theopold, K H ^[1]

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1. Univ. of Delaware, Newark, DE (United States)

In the search for homogeneous oxidation catalysts, the authors are investigating sterically hindered tris(pyrazolyl) borate complexes. For example, hydrotris(3-tert-butyl-5-methylpyrazolyl)borate (Tp{prime}) stabilizes the unusual side-on bonded superoxo-cobalt complex Tp{prime}Co{sup II}(O{sub 2}). During study of this complex there arose the need to prepare an analogous molecule with isopropyl groups in place of the tert-butyl substituents of the pyrazolyl rings. As a starting material for this chemistry, the authors prepared and structurally characterized Tp{double_prime}Co{sup II}I (Tp{double_prime} = hydrotris(3-isopropyl-5-methylpyrazoly)borate). The separation of the latter from its regioisomers takes advantage of a rather unusual solubility effect, termed {open_quotes}inverse recrystallization{close_quotes}. The potential utility of this phenomenon in related systems prompted this note.

• Sponsoring Organization: USDOE
• DOE Contract Number: FG02-92ER14273
• OSTI ID: 450861
• Journal Information: Inorganic Chemistry, Journal Name: Inorganic Chemistry Journal Issue: 10 Vol. 33; ISSN 0020-1669; ISSN INOCAJ
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
BORON COMPOUNDS
OXIDATION
RECRYSTALLIZATION