Computational investigation of Group 1 metal-chlorate ion pairs and their monohydrates

2008 ◽  
Vol 868 (1-3) ◽  
pp. 42-49 ◽  
Author(s):  
Ryan P. Dain ◽  
Michael J. Van Stipdonk
Keyword(s):  
Ion Pairs ◽  
Computational Investigation ◽  
Group 1

Controlling Al–M Interactions in Group 1 Metal Aluminyls (M = Li, Na, and K). Facile Conversion of Dimers to Monomeric and Separated Ion Pairs

2021 ◽  
Author(s):  
Matthew J. Evans ◽  
Mathew D. Anker ◽  
Michael G. Gardiner ◽  
Claire L. McMullin ◽  
Martyn P. Coles
Keyword(s):  
Ion Pairs ◽  
Group 1

Ionic radii for Group 1 halide crystals and ion-pairs

2005 ◽  
pp. 702 ◽  
Author(s):  
Richard J. Collin ◽  
Barry C. Smith
Keyword(s):  
Ion Pairs ◽  
Ionic Radii ◽  
Group 1

scholarly journals Asymmetric Synthesis of Griffipavixanthone Employing a Chiral Phosphoric Acid-Catalyzed Cycloaddition

2018 ◽  
Author(s):  
Michael Smith ◽  
Kyle Reichl ◽  
Randolph Escobar ◽  
Thomas Heavey ◽  
David Coker ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Asymmetric Synthesis ◽  
Ion Pairs ◽  
Biologically Active ◽  
Asymmetric Induction ◽  
Quinone Methide ◽  
Computational Investigation ◽  
Chiral Phosphoric Acid ◽  
Acid Catalyzed ◽  
Absolute Stereochemistry

Asymmetric synthesis of the biologically active xanthone dimer griffipavixanthone (GPX) is reported along with its absolute stereochemistry determination. Synthesis of the natural product is accomplished <i>via</i> dimerization of a <i>p-</i>quinone methide (<i>p-</i>QM) using a chiral phosphoric acid (CPA) catalyst to afford a protected precursor in excellent diastereo- and enantioselectivity. Mechanistic studies, including an unbiased computational investigation of chiral ion-pairs using parallel tempering (PT), were performed in order to probe the mode of asymmetric induction

scholarly journals Asymmetric Synthesis of Griffipavixanthone Employing a Chiral Phosphoric Acid-Catalyzed Cycloaddition

2018 ◽  
Author(s):  
Michael Smith ◽  
Kyle Reichl ◽  
Randolph Escobar ◽  
Thomas Heavey ◽  
David Coker ◽  
...  
Keyword(s):  
Phosphoric Acid ◽  
Asymmetric Synthesis ◽  
Ion Pairs ◽  
Biologically Active ◽  
Asymmetric Induction ◽  
Quinone Methide ◽  
Computational Investigation ◽  
Chiral Phosphoric Acid ◽  
Acid Catalyzed ◽  
Absolute Stereochemistry

Asymmetric synthesis of the biologically active xanthone dimer griffipavixanthone (GPX) is reported along with its absolute stereochemistry determination. Synthesis of the natural product is accomplished <i>via</i> dimerization of a <i>p-</i>quinone methide (<i>p-</i>QM) using a chiral phosphoric acid (CPA) catalyst to afford a protected precursor in excellent diastereo- and enantioselectivity. Mechanistic studies, including an unbiased computational investigation of chiral ion-pairs using parallel tempering (PT), were performed in order to probe the mode of asymmetric induction

Effect of Contraceptive Steroids on the Endometrium of Guinea Pig: SEM study

1977 ◽  
Vol 35 ◽  
pp. 668-669
Author(s):  
Mai M. Said ◽  
Ramesh K. Nayak ◽  
Randall E. McCoy
Keyword(s):  
Guinea Pig ◽  
Reproductive Tract ◽  
Three Dimensional ◽  
Female Reproductive Tract ◽  
Human Female ◽  
Surface Ultrastructure ◽  
Transmission Electron ◽  
Sem Study ◽  
Uterine Mucosa ◽  
Group 1

Burgos and Wislocki described changes in the mucosa of the guinea pig uterus, cervix and vagina during the estrous cycle investigated by transmission electron microscopy. More recently, Moghissi and Reame reported the effects of progestational agents on the human female reproductive tract. They found drooping and shortening of cilia in norgestrel and norethindrone- treated endometria. To the best of our knowledge, no studies concerning the effects of mestranol and norethindrone given concurrently on the three-dimensional surface features on the uterine mucosa of the guinea pig have been reported. The purpose of this study was to determine the effect of mestranol and norethindrone on surface ultrastructure of guinea pig uterus by SEM.Seventy eight animals were used in this study. They were allocated into two groups. Group 1 (20 animals) was injected intramuscularly 0.1 ml vegetable oil and served as controls.

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