Conformation and structure of cyclo-(dibenzylglycyl-L-proline) and cyclo-(di-L-prolyl-D-proline) in the crystalline state

Bats, Jan W.; Fuess, Harald

doi:10.1021/ja00526a049

Cited by 24 publications

(7 citation statements)

References 5 publications

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“…1 and 2) for the three peptide groups are very similar and agree well with values observed in the other cyclic tripeptides (Druyan, Coulter, Walter, Kartha & Ambady, 1976;Kartha & Ambady, 1975;Bats & Fuess, 1980). The main difference between the prolyl and the N-benzyl- monochromated Mo Ka radiation.…”

Section: Cycio(-n-benzylglycyl-l-prolyl-l-prolyl-)supporting

confidence: 85%

Conformation and structure of cyclo(-N-benzylglycyl-L-prolyl-L-prolyl-)

Bats¹,

Fuess²

1982

Acta Crystallogr Sect B

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Section: Cycio(-n-benzylglycyl-l-prolyl-l-prolyl-)supporting

confidence: 85%

Conformation and structure of cyclo(-N-benzylglycyl-L-prolyl-L-prolyl-)

Bats¹,

Fuess²

1982

Acta Crystallogr Sect B

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“…Further details of the 1,4-dehydrogenation process were investigated for the simplest case, «-butane. The variation of product abundance with kinetic energy is shown for unlabeled «-butane (7) Armentrout, P. B.; Beauchamp, J. L. Chem. Phys.…”

Section: Resultsmentioning

confidence: 99%

“…Similar results are obtained with C2D4, which should have essentially the same binding energy as C2H4. Variation of ion abundance with time and double resonance spectra show that reactions 7 and 8 occur when C2D4 is added to the Ni(C2H4)2+ + C2D4 -Ni(C2H4)(C2D4)+ + C2H4 (7) Ni(C2H4)(C2D4)+ + C2D4 -Ni(C2D4)2+ + C2H4 (8) reaction system containing 5 X 10™7 torr of «-butane. Double resonance spectra for Ni(C2D4)2+ and Ni(C2H4)(C2D4)+ show no contribution from Ni(C2H4)+.…”

Section: Ii-ni -||mentioning

confidence: 99%

Nickel ions effect a highly specific 1,4-dehydrogenation of hydrocarbons in the gas phase: metallacycles are not involved

Halle¹,

Houriet²,

Kappes³

et al. 1982

J. Am. Chem. Soc.

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Reactions of singly charged atomic nickel ions with several linear alkanes have been studied using an ion beam apparatus and ion cyclotron resonance spectroscopy (ICR). Results using deuterated compounds indicate that dehydrogenation is an important reaction which proceeds via a highly specific 1,4 process. ICR studies of the subsequent reactions of the NiC4H8+ ion formed from dehydrogenation of n-butane with Ni+ suggest that loss of H2 occurs by oxidative addition to the internal carbon-carbon bond followed by a (¡-hydrogen transfer to the metal. This intermediate can then either reductively eliminate an alkane or abstract another ß hydrogen and eliminate H2, forming what can be most simply described as a bisolefin complex.

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“…The RICON program was successfully used for the conformational analysis of hundreds of various cyclic molecules. As an illustration consider the analysis of X-ray structural data for several organic molecules containing cyclic fragments. − …”

Section: Examples Of Ricon Usagementioning

confidence: 99%

RICONThe Computer Program for the Quantitative Investigations of Cyclic Organic Molecule Conformations

Zotov

Palyulin

Зефиров

1997

J. Chem. Inf. Comput. Sci.

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The methods of quantitative conformational analysis of cyclic fragments in molecules and the computer program RICON (RIng CONformations) developed by us for this purpose are considered. Program RICON uses atomic coordinates obtained from X-ray studies or force field/quantum chemical computations and allows one to analyze geometric parameters of a molecule, to compute the puckering parameters of rings in the molecule using various methods, and to obtain a verbal description of a ring conformation. The abilities of the program are described, and the examples of its application are given.

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Conformation and structure of cyclo-(dibenzylglycyl-L-proline) and cyclo-(di-L-prolyl-D-proline) in the crystalline state

Cited by 24 publications

References 5 publications

Conformation and structure of cyclo(-N-benzylglycyl-L-prolyl-L-prolyl-)

Conformation and structure of cyclo(-N-benzylglycyl-L-prolyl-L-prolyl-)

Nickel ions effect a highly specific 1,4-dehydrogenation of hydrocarbons in the gas phase: metallacycles are not involved

RICONThe Computer Program for the Quantitative Investigations of Cyclic Organic Molecule Conformations

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