Title
Probing the role of weak outer sphere interactions (H-bonds) in <tex>VO(3,5-^{t}Bu_{2}-salophen)$</tex>: epoxide adducts by EPR, ENDOR and HYSCORE Probing the role of weak outer sphere interactions (H-bonds) in <tex>VO(3,5-^{t}Bu_{2}-salophen)$</tex>: epoxide adducts by EPR, ENDOR and HYSCORE
Author
Faculty/Department
Faculty of Sciences. Chemistry
Faculty of Sciences. Physics
Publication type
article
Publication
Amsterdam ,
Subject
Physics
Chemistry
Source (journal)
Chemical physics letters. - Amsterdam
Volume/pages
486(2010) :1/3 , p. 74-79
ISSN
0009-2614
ISI
000273986500016
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
The role of H-bonds in controlling the binding mode of epoxides, namely propylene oxide (3) and cis-2,3-epoxybutane (4), to the vanadyl salen-type complexes, N,N′-bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexane-diamino-vanadium (IV) oxide, [VO(1)], and VO(3,5-tBu2-salophen), [VO(2)], have been examined using cw-EPR, cw-ENDOR and HYSCORE spectroscopy. One of the methine protons from the cyclohexyl backbone in [VO(1)] has previously been shown to form a weak H-bond with the epoxide oxygen atom. The absence of this methine proton in the salophen derivative [VO(2)] removes this H-bonding ability of the complex and in turn weakens the epoxide interaction.
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