B. Mikhova - Academia.edu (original) (raw)
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INDIAN AGRICULTURAL RESEARCH INSTITUTE, NEW DELHI, INDIA
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Papers by B. Mikhova
Magnetic Resonance in Chemistry, 1998
ABSTRACT
Journal of Molecular Structure, 2004
ABSTRACT The 13C chemical shifts of 20 rigid bicyclic compounds have been calculated with ab init... more ABSTRACT The 13C chemical shifts of 20 rigid bicyclic compounds have been calculated with ab initio HF and MP2 methods. The calculations showed very good reproducibility of the experimental values. The molecular orbital interactions in the rigid, nearly planar δ-syn-axial fragments in the isomeric groups of norbornane derivatives 1.x–4.x were studied in detail and were employed to explain the deshielding δ-syn-axial effect in 13C NMR spectroscopy.
Journal of Molecular Structure, 1992
Some examples demonstrating a correlation between the overall r3C-chemical shielding (ZY) and the... more Some examples demonstrating a correlation between the overall r3C-chemical shielding (ZY) and the molecular mechanics steric energy observed for five-membered heterocycles are presented.
Fitoterapia, 2009
A new steroidal alkaloid, (−)-veranigrine (1) was isolated from the roots and rhizomes of Veratru... more A new steroidal alkaloid, (−)-veranigrine (1) was isolated from the roots and rhizomes of Veratrum nigrum L. By means of spectroscopic methods its structure was established as (20S, 25S)-iminocholesta-5,22(N)-diene-1β,3β-diol.
Fitoterapia, 2011
The occurrence of the two new cis-fused A/B rings furostanol saponins (25S)-26-O-β-Dglucopyranosy... more The occurrence of the two new cis-fused A/B rings furostanol saponins (25S)-26-O-β-Dglucopyranosyl-5β-furostan-1β,3β,22α,26-tetraol-1-O-β-D-glucopyranoside and (25S)-26-Oβ-D-glucopyranosyl-5β-furostan-1β,2β,3β,5β,22α,26-hexaol and the known compounds
Applied Physics Letters, 2003
A new series of iron(III) complexes [Fe(L 1 )(HL 1 )], [Fe(L 1 )Cl]; [H 2
![Research paper thumbnail of 3-[2-(5- tert -Butyl-1,2-oxazol-3-yl)hydrazinylidene]chroman-2,4-dione](https://attachments.academia-assets.com/39447332/thumbnails/1.jpg)
](Acta Crystallographica Section E Structure Reports Online, 2013
This open-access article is distributed under the terms of the Creative Commons Attribution Licen... more This open-access article is distributed under the terms of the Creative Commons Attribution Licence http://creativecommons.org/licenses/by/2.0/uk/legalcode, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
Monatshefte f�r Chemie Chemical Monthly, 1997
Magnetic Resonance in Chemistry, 1998
ABSTRACT
Journal of Molecular Structure, 2004
ABSTRACT The 13C chemical shifts of 20 rigid bicyclic compounds have been calculated with ab init... more ABSTRACT The 13C chemical shifts of 20 rigid bicyclic compounds have been calculated with ab initio HF and MP2 methods. The calculations showed very good reproducibility of the experimental values. The molecular orbital interactions in the rigid, nearly planar δ-syn-axial fragments in the isomeric groups of norbornane derivatives 1.x–4.x were studied in detail and were employed to explain the deshielding δ-syn-axial effect in 13C NMR spectroscopy.
Journal of Molecular Structure, 1992
Some examples demonstrating a correlation between the overall r3C-chemical shielding (ZY) and the... more Some examples demonstrating a correlation between the overall r3C-chemical shielding (ZY) and the molecular mechanics steric energy observed for five-membered heterocycles are presented.
Fitoterapia, 2009
A new steroidal alkaloid, (−)-veranigrine (1) was isolated from the roots and rhizomes of Veratru... more A new steroidal alkaloid, (−)-veranigrine (1) was isolated from the roots and rhizomes of Veratrum nigrum L. By means of spectroscopic methods its structure was established as (20S, 25S)-iminocholesta-5,22(N)-diene-1β,3β-diol.
Fitoterapia, 2011
The occurrence of the two new cis-fused A/B rings furostanol saponins (25S)-26-O-β-Dglucopyranosy... more The occurrence of the two new cis-fused A/B rings furostanol saponins (25S)-26-O-β-Dglucopyranosyl-5β-furostan-1β,3β,22α,26-tetraol-1-O-β-D-glucopyranoside and (25S)-26-Oβ-D-glucopyranosyl-5β-furostan-1β,2β,3β,5β,22α,26-hexaol and the known compounds
Applied Physics Letters, 2003
A new series of iron(III) complexes [Fe(L 1 )(HL 1 )], [Fe(L 1 )Cl]; [H 2
Acta Crystallographica Section E Structure Reports Online, 2013
This open-access article is distributed under the terms of the Creative Commons Attribution Licen... more This open-access article is distributed under the terms of the Creative Commons Attribution Licence http://creativecommons.org/licenses/by/2.0/uk/legalcode, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
Monatshefte f�r Chemie Chemical Monthly, 1997