Collect. Czech. Chem. Commun. 1968, 33, 1385-1392
https://doi.org/10.1135/cccc19681385

Internal rotation energy barrier of terminal N-dimethyl groups as a function of the length of polymethinium chains

Z. Samek

Individual author index pages


Other CCCC articles of these authors

  • Z. Samek, M. Holub, B. Drożdż, H. Grabarczyk and B. Hładoń
    Xerantholide - A new cytotoxically active sesquiterpenic lactone from Xeranthemum cylindraceum SIBTH. et SMITH
    1977, Vol. 42, Issue 8, pp. 2441–2447 [Abstract]
  • J. Jizba, Z. Samek and L. Novotný
    A sesquiterpenic alkaloid, eremophilene lactam, from the rhizomes of Petasites hybridus
    1977, Vol. 42, Issue 8, pp. 2438–2440 [Abstract]
  • Z. Samek, M. Holub, B. Drożdż and H. Grabarczyk
    Arctolide - A new sesquiterpenic lactone from Arctotis grandis THUNB.
    1977, Vol. 42, Issue 7, pp. 2217–2223 [Abstract]
  • Z. Samek, J. Hapala, O. Fiedler and Z. Arnold
    Structure of amidomalonaldehydes and some related compounds
    1977, Vol. 42, Issue 5, pp. 1659–1685 [Abstract]
  • Z. Samek, M. Holub, H. Grabarczyk, B. Drożdż and V. Herout
    The structure of hydroxyisonobilin - A cytostatically active sesquiterpenic lactone from the leaves of Anthemis nobilis L.
    1977, Vol. 42, Issue 3, pp. 1065–1068 [Abstract]
  • M. Holub and Z. Samek
    Isolation and structure of 3-epinobilin, 1,10-epoxynobilin and 3-dehydronobilin - Other sesquiterpenic lactones from the flowers of Anthemis nobilis L. Revision of the structure of nobilin and eucannabinolide
    1977, Vol. 42, Issue 3, pp. 1053–1064 [Abstract]
  • J. Farkaš, K. Šebesta, K. Horská, Z. Samek, L. Dolejš and F. Šorm
    Structure of thuringiensin, the thermostable exotoxin from Bacillus thuringiensis
    1977, Vol. 42, Issue 3, pp. 909–929 [Abstract]
  • J. Harmatha, Z. Samek, M. Synáčková, L. Novotný, V. Herout and F. Šorm
    Neutral components of the extract from Homogine alpina (L.) CASS.
    1976, Vol. 41, Issue 7, pp. 2047–2058 [Abstract]
  • Z. Samek, M. Holub, E. Bloszyk, B. Drożdż and V. Herout
    Relative and absolute configuration of the sequiterpenic lactone erivanin
    1975, Vol. 40, Issue 9, pp. 2676–2679 [Abstract]
  • V. Benešová, Z. Samek and S. Vašíčková
    Structure of the sequiterpenic lactone diplophyllolide and other components from the liverwort Diplophyllum albicans (L.) DUM.
    1975, Vol. 40, Issue 6, pp. 1966–1970 [Abstract]
  • K. Čapek, J. Jarý and Z. Samek
    Contraction of the pyranoside ring in methyl 3-acetamido-3,6-dideoxy-2-O-methanesulfonyl-α-L-gluco- and -α-L-galactopyranoside
    1975, Vol. 40, Issue 1, pp. 149–163 [Abstract]
  • K. Vokáč and Z. Samek
    Standard sesquiterpenic lactones for structural correlations; Stereoisomeric (6R,7S,10S,11S)-10-hydroxyguaian-6,12-olides and related (6R,7S)-guaienolides
    1974, Vol. 39, Issue 2, pp. 480–500 [Abstract]
  • Z. Samek, M. Holub, H. Grabarczyk, B. Drożdż and V. Herout
    On terpenes. CCXXIX. Structure of sesquiterpenic lactones from Tanacetum vulgare L.
    1973, Vol. 38, Issue 7, pp. 1971–1976 [Abstract]
  • M. Holub, Z. Samek, D. P. Popa and V. Herout
    On terpenes. CCXXVIII. The structure of the sesquiterpenic lactone silerolide
    1973, Vol. 38, Issue 6, pp. 1804–1808 [Abstract]
  • M. Holub, Z. Samek, R. DeGroote, V. Herout and F. Šorm
    On terpenes. CCXXVII. The structure of the sesquiterpenic triester lactone trilobolide
    1973, Vol. 38, Issue 5, pp. 1551–1562 [Abstract]
  • M. Holub and Z. Samek
    On terpenes. CCXXVI. The structure of lasolide - A sesquiterpenic lactone from Laser trilobum (L.) BORKH.
    1973, Vol. 38, Issue 5, pp. 1428–1433 [Abstract]
  • L. Novotný, M. Krojidlo, Z. Samek, J. Kohoutová and F. Šorm
    On terpenes. CCXXIII. The structure of nemosenins A, B, C, D, and senemorin, new furoeremophilane derivatives from Senecio nemorensis, subsp. fuchsii
    1973, Vol. 38, Issue 3, pp. 739–755 [Abstract]
  • M. Holub and Z. Samek
    On terpenes. CCXXII. The structure of archangelolide, a sesquiterpenic lactone from Laserpitium archangelica WULF.
    1973, Vol. 38, Issue 3, pp. 731–738 [Abstract]
  • B. Drożdż, Z. Samek, M. Holub and V. Herout
    On terpenes. CCXXI. The structure of alatolide, a sesquiterpenic lactone from Jurinea alata CASS.
    1973, Vol. 38, Issue 3, pp. 727–730 [Abstract]
  • P. Sedmera, A. Vítek and Z. Samek
    Computer construction of standard steroid models
    1972, Vol. 37, Issue 12, pp. 3828–3836 [Abstract]
  • Z. Samek, M. Holub, K. Vokáč, B. Drożdż, G. Jommi, P. Gariboldi and A. Corbella
    On terpenes. CCXIX. The structure of grosheimin
    1972, Vol. 37, Issue 8, pp. 2611–2629 [Abstract]
  • B. Drożdż, H. Grabarczyk, Z. Samek, M. Holub, V. Herout and F. Šorm
    On terpenes. CCXVI. Sesquiterpenic lactones from Eupatorium cannabinum L. Revision of the structure of eupatoriopicrin
    1972, Vol. 37, Issue 5, pp. 1546–1554 [Abstract]
  • K. Vokáč, Z. Samek, V. Herout and F. Šorm
    On terpenes. CCXV. Absolute configuration of artabsin
    1972, Vol. 37, Issue 4, pp. 1346–1355 [Abstract]
  • M. Holub, O. Motl, Z. Samek and V. Herout
    On terpenes. CCXIV. The structure of two sesquiterpenic lactones, isomontanolide and acetylisomontanolide from Laserpitium siler L.
    1972, Vol. 37, Issue 4, pp. 1186–1194 [Abstract]
  • H. Naimie, Z. Samek, L. Dolejš and Z. Řeháček
    Über die flüchtigen Inhaltstoffe von Asa foetida; Zwei neuen natürlichen Schweffelverbindungen mit pestizider Wirkung
    1972, Vol. 37, Issue 4, pp. 1166–1177 [Abstract]
  • J. Popławski, M. Holub, Z. Samek and V. Herout
    On terpenes. CCIX. Arnicolides - sesquiterpenic lactones from the leaves of Arnica montana L.
    1971, Vol. 36, Issue 6, pp. 2189–2199 [Abstract]
  • Z. Samek, M. Holub, V. J. Novikov, J. N. Forostjan and D. P. Popa
    On terpenes. CCVIII. The structure of ivoxanthin, a sesquiterpenic lactone from Cyclachaena xanthifolia FRESEN.
    1970, Vol. 35, Issue 12, pp. 3818–3821 [Abstract]
  • M. Holub, D. P. Popa, Z. Samek, V. Herout and F. Šorm
    On terpenes. CCVI. Neutral components of the light petroleum extract of the root of Laserpitium siler L. The structure of the sesquiterpenic lactone montanolide
    1970, Vol. 35, Issue 11, pp. 3296–3308 [Abstract]
  • K. Kefurt, J. Jarý and Z. Samek
    Lactones. XIV. Reaction of methyl 2,3-O-isopropylidene-α-L-rhamnopyranoside with the triphenyl phosphite-methyl iodide reagent
    1970, Vol. 35, Issue 9, pp. 2613–2622 [Abstract]
  • K. Vokáč, Z. Samek, V. Herout and F. Šorm
    On terpenes. CCV. The structure of two native orange substances from Lactarius deliciosus L.
    1970, Vol. 35, Issue 4, pp. 1296–1301 [Abstract]
  • J. Křepinský, G. Jommi, Z. Samek and F. Šorm
    On terpenes. CCIV. The sesquiterpenic constituents of Aristolochia debilis SIEB. et ZUCC. The structure of debilone
    1970, Vol. 35, Issue 2, pp. 745–748 [Abstract]
  • M. Holub, Z. Samek, D. P. Popa, V. Herout and F. Šorm
    On terpenes. CCIII. The structure of laserolide, a sesquiterpenic lactone from the roots of Laser trilobum L. BORKH.
    1970, Vol. 35, Issue 1, pp. 284–294 [Abstract]
  • Z. Samek, J. Harmatha, L. Novotný and F. Šorm
    On terpenes. CCII. Absolute configuration of adenostylone, neoadenostylone and isoadenostylone from Adenostyles alliariae (GOUAN) KERN, and of decompostin from Cacalia decomposita A. GRAY
    1969, Vol. 34, Issue 9, pp. 2792–2808 [Abstract]
  • K. Vokáč, Z. Samek, V. Herout and F. Šorm
    On terpenes. CCI. The structure of artabsin and the origin and structure of the coloured hydrocarbon chamazulenogen from wormwood oil
    1969, Vol. 34, Issue 8, pp. 2288–2305 [Abstract]
  • V. Benešová, Z. Samek, V. Herout and F. Šorm
    Plant substances. XXIX. Isolation and structure of two new indole alkaloids from Riccardia sinuata (HOOK.) TREV.
    1969, Vol. 34, Issue 6, pp. 1807–1809 [Abstract]
  • J. Harmatha, Z. Samek, L. Novotný, V. Herout and F. Šorm
    On terpenes. CC. The structure of adenostylone, isoadenostylone and neoadenostylone - components of the rhizomes of Adenostyles alliariae (GOUAN) KERN.
    1969, Vol. 34, Issue 6, pp. 1739–1749 [Abstract]
  • J. Farkaš, K. Šebesta, K. Horská, Z. Samek, L. Dolejš and F. Šorm
    The structure of exotoxin of Bacillus thuringiensis var. gelechiae. Preliminary communication
    1969, Vol. 34, Issue 3, pp. 1118–1120 [Abstract]
  • V. Benešová, Z. Samek, V. Herout and F. Šorm
    On terpenes. CXCVIII. Isolation and structure of pinguisone from Aneura pinguis (L.) DUM.
    1969, Vol. 34, Issue 2, pp. 582–592 [Abstract]
  • L. Novotný, Z. Samek, J. Harmatha and F. Šorm
    On terpenes. CXCVI. 9-Hydroxyfuroeremophilane, a further dominating component from light petroleum extract of Petasites hybridus (L.) GAERTN., MEY et SCHERB. rhizomes
    1969, Vol. 34, Issue 1, pp. 336–339 [Abstract]
  • V. Špirko and Z. Samek
    On the Hamiltonian traces in high-resolution NMR analysis
    1968, Vol. 33, Issue 10, pp. 3372–3374 [Abstract]
  • M. Suchý, Z. Samek, V. Herout and F. Šorm
    On terpenes. CXCV. The structure and absolute configuration of scabiolide
    1968, Vol. 33, Issue 7, pp. 2238–2244 [Abstract]
  • P. Sedmera, F. Hanousek and Z. Samek
    Chemistry of boranes. XIII. Determination of structure of some halogenedecaboranes and oxido-bis-tridecahydrodecaborane by means of 11B NMR and IR spectra
    1968, Vol. 33, Issue 7, pp. 2169–2176 [Abstract]
  • B. Drożdż, M. Holub, Z. Samek, V. Herout and F. Šorm
    On terpenes. CXCII. The constitution and absolute configuration of onopordopicrine - A sesquiterpenic lactone from Onopordon acanthium L.
    1968, Vol. 33, Issue 6, pp. 1730–1737 [Abstract]
  • M. Suchý, Z. Samek, V. Herout and F. Šorm
    On terpenes. CXC. Constitution and configuration of albicolide, a new germacranolide from Jurinea albicaulis
    1967, Vol. 32, Issue 11, pp. 3934–3940 [Abstract]
  • M. Suchý, Z. Samek, V. Herout, R. B. Bates, G. Snatzke and F. Šorm
    On terpenes. CLXXXVIII. Constitution and configuration of pelenolides, a new group of sesquiterpene lactone germacranolides
    1967, Vol. 32, Issue 11, pp. 3917–3925 [Abstract]
  • K. Bláha and Z. Samek
    Amino acids and peptides. LXXVI. NMR-spectroscopy of cis-peptide bonds in diastereomeric piperazinediones
    1967, Vol. 32, Issue 10, pp. 3780–3784 [Abstract]
  • M. Suchý, Z. Samek, V. Herout and F. Šorm
    On terpenes. CLXXXVI. The structure of salonitenolide, a sesquiterpenic lactone of germacrane type from Centaurea salonitana VIS
    1967, Vol. 32, Issue 5, pp. 2016–2021 [Abstract]
  • M. Holub, Z. Samek, V. Herout and F. Šorm
    On terpenes. CLXXXIII. The constitution of laserpitine - a sesquiterpenic compound from Laserpitium latifolium L. root
    1967, Vol. 32, Issue 2, pp. 591–609 [Abstract]
  • Z. Ksandr, Z. Samek, V. Špirko and M. Ferles
    Studies in the pyridine series. XIII. NMR-shift ranges for some isomeric alkylsubstituted tetrahydropyridines
    1966, Vol. 31, Issue 7, pp. 3003–3007 [Abstract]
  • L. Lábler, Z. Samek, J. Smolíková and F. Šorm
    On steroids. XCVII. Isolation and structure of some secondary formed weak bases from Holarrhena antidysenterica
    1966, Vol. 31, Issue 5, pp. 2034–2047 [Abstract]
  • L. Novotný, Z. Samek and F. Šorm
    On terpenes. CLXXVI. Isolation and structure of dimethoxydihydrofuroeremophilane
    1966, Vol. 31, Issue 1, pp. 371–374 [Abstract]
  • M. Suchý, Z. Samek, V. Herout and F. Šorm
    On terpenes. CLXXV. Revision of structure of artiopicrin, cnicin and scabiolide
    1965, Vol. 30, Issue 10, pp. 3473–3478 [Abstract]
  • Z. Samek and J. Farkaš
    Nucleic acid components and their analogues. LXIV. Nuclear magnetic resonance spectra of anomeric 1-D-ribopyranosylthymines
    1965, Vol. 30, Issue 7, pp. 2149–2156 [Abstract]