80594-54-3Relevant academic research and scientific papers
Noncovalent interactions in metal complexes. 3. Stereoselectivity caused by interligand, hydrophobic CH?π interaction in 1-l-menthoxy-3-benzoylacetonato complexes
Okawa, Hisashi,Ueda, Kohichi,Kida, Sigeo
, p. 1594 - 1598 (2008/10/08)
Bivalent and trivalent metal complexes of 1-l-menthoxy-3-benzoylacetone (H(l-moba)) have been synthesized and characterized by means of NMR, electronic absorption, and circular dichroism spectra. On the basis of the NMR spectrum, it was demonstrated that the cis isomer was preferentially formed in the case of [Co(l-moba)3]. CD spectra revealed that [Co(l-moba)3] was almost optically pure without any effort for resolution, while [Cr(l-moba)3] was partly resolved. [Mn(l-moba)3] was also shown to be optically active. The absolute configurations of [Co(l-moba)3] and [Cr(l-moba)3] were determined to be of the Δ form, the same configuration being supposed for [Mn(l-moba)3]. Selective syntheses of the cis-Δ isomer for [M(l-moba)3] have been interpreted in terms of the interligand, hydrophobic CH?π interaction operating between the phenyl and the chiral l-menthyl groups.
