Results 211 to 220 of about 764,845 (266)
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A cis,trans,cis,cis-[4.5.5.5]Fenestrane Derivative
Acta Crystallographica Section C Crystal Structure Communications, 1996The title compound, rel-(1R,4R,7S,10R)-7-(tert-butyldimethylsilyloxy)tetracyclo [5.4.1.04,12.010,12]dodecan-2-one, C18H30O2Si, has been prepared and its structure determined. The geometry of the central C(C)4 substructure of the fenestrane skeleton shows a considerable distortion from an ideal tetrahedral arrangement towards planarity. Values of 127.0
M. Thommen, R. Keese, M. Förtsch
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A Substituted cis,trans,cis,cis-[4.5.5.5]Fenestrene
Acta Crystallographica Section C Crystal Structure Communications, 1996The title compound, rel-(1S,4R,7R,9S-tetracyclo- [5.4.1.0 4,12 .0 9,12 ]dodec-10-enyl-l-acetic acid, C 14 H 18 O 2 , has been prepared and its structure elucidated. The geometry of the central C(C)4 substructure shows a considerable distortion from an ideal tetrahedral arrangement towards planarity, with two opposite bond angles of of 119.2(2) and 134 ...
J. Wang, M. Thommen, R. Keese
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cis,cis,cis-Tetramethyl 1,2,4,5-cyclohexanetetracarboxylate
Acta Crystallographica Section C Crystal Structure Communications, 2000The title compound, C(14)H(20)O(8), was synthesized from the hydrogenation of tetramethyl 1,4-cyclohexadiene-1,2,4, 5-tetracarboxylate with a catalytic amount of palladium/carbon. All four carbonyl moieties of the methyl ester groups are on the same face of the chair-conformed ring.
, Robinson +6 more
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Mass Spectrometry Used to Discriminate Between Cis‐Syn‐Cis and Cis‐Anti‐Cis Photoadducts
Bulletin des Sociétés Chimiques Belges, 1980AbstractCis‐syn‐cis and cis‐anti‐cis regioisomers of tricyclo [6.2.0.02, 7] decan‐3‐ones or tricyclo [5.2.0.02, 6nonan‐3‐ones, formed by (π2 +π2) photocycloaddition reactions between 1, 2‐bis (trimethylsiloxy) cyclobutene and 2‐cyclohexenones or 2‐cyclopentenones, respectively, are unequivocally identified by analysis of the isobutane chemical ...
Martine Van Audenhove +2 more
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iCI: Iterative CI toward full CI
Journal of Chemical Theory and Computation, 2016It is shown both theoretically and numerically that the minimal multireference configuration interaction (CI) approach [Liu, W.; Hoffmann, M. R. Theor. Chem. Acc. 2014, 133, 1481] converges quickly and monotonically from above to full CI by updating the primary, external, and secondary states that describe the respective static, dynamic, and again ...
Wenjian, Liu, Mark R, Hoffmann
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Stereochemistry of the enzymic lactonisation of cis,cis-muconic and 3-methyl-cis,cis-muconic acid
Journal of the Chemical Society, Perkin Transactions 1, 1996Experiments with 4-methyl[3,5,6-2H3]pyrocatechol 7 have shown that the product of its enzymic oxygenation, 3-methyl-cis,cis-muconic acid 8, undergoes enzymic cyclisation by syn addition of carboxy groups to distal double bonds to form the (S)-4-methylmuconolactone 9 in the bacterium Pseudomonas putida and the (S)-3-methylmuconolactone 11 in the fungus ...
Beining Chen +3 more
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ChemInform Abstract: DARST. UND ISOLIERUNG DES CIS,CIS,CIS,CIS‐CYCLONONATETRAENS‐(1,3,5,7)
Chemischer Informationsdienst. Organische Chemie, 1970AbstractDie Darstellung der Titelverbindung (II) erfolgt aus dem Ion (I) mit Eiswasser bei 0°C. Mit Methyljodid entsteht aus (I) das Methylderivat (III).
PHILLIP RADLICK, GARY ALFORD
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CI Implementation: An Empirical Test of the CI Maturity Model
Creativity and Innovation Management, 2006There are a number of tools available for organizations wishing to measure and subsequently develop Continuous Improvement (CI). In this article, we review and evaluate a well‐accepted CI development model, namely the CI Maturity Model (Bessant and Caffyn, 1997), against data collected from the 2nd Continuous Improvement Network Survey and a number of ...
Jørgensen, Frances +2 more
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Gender and Language, 2021
Trans and other nonnormatively gendered subjectivities served a foundational role in queer linguistics, but it is only recently that a wave of trans researchers have begun to carve out distinctively trans approaches to the study of language. This commentary explores the question of why this shift has taken so long and how certain disciplinary norms ...
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Trans and other nonnormatively gendered subjectivities served a foundational role in queer linguistics, but it is only recently that a wave of trans researchers have begun to carve out distinctively trans approaches to the study of language. This commentary explores the question of why this shift has taken so long and how certain disciplinary norms ...
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The stereospecific synthesis of cis-cis-stercobilinogen and cis-cis stercobilin
Tetrahedron Letters, 1967Z.J. Petryka, C.J. Watson
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