Zobrazeno 1 - 10
of 23
pro vyhledávání: '"David Wiedenfeld"'
Autor:
David Wiedenfeld
Publikováno v:
Check List, Vol 2, Iss 2, Pp 1-27 (2006)
Although the Galapagos avifauna has been described previously, it is necessary to list, clarify, and update the previously published records of birds occurring in the archipelago, and to clarify some recent records that are erroneous or were presente
Externí odkaz:
https://doaj.org/article/938ab38d0fdd4d92b79f58bc8bbc291e
Publikováno v:
Polyhedron. 26:3577-3584
Knoevenagel condensation of 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione (bpcd) with thiophene-2-carboxaldehyde furnishes the second-generation unsaturated diphosphine ligand 2-(2-thienylidene)-4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::96de62ba61626c04fdc9cb666b17aaab
https://doi.org/10.1016/j.poly.2007.03.039
https://doi.org/10.1016/j.poly.2007.03.039
Publikováno v:
Oryx. 41:337-342
Although the killing of giant tortoises in the Galapagos Islands has been prohibited since 1933, poaching of tortoises still occurs. Personnel of the Galapagos National Park Service and the Charles Darwin Research Station regularly survey populations
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a8cd1c6530685c7544ecc30cf008b142
https://doi.org/10.1017/s0030605307000211
https://doi.org/10.1017/s0030605307000211
Autor:
Daniel May, David Wiedenfeld, Guanmin Wu, William H. Watson, Michael G. Richmond, David R. Glass
Publikováno v:
Journal of Organometallic Chemistry. 690:4993-4999
The reaction of the heterocyclic ligand 2,3-bis(methylthio)pyrrolo[1,2- a ]benzimidazol-1-one with the rhenium(I) compound BrRe(CO) 3 (THF) 2 has been explored and found to give the new complex fac -BrRe(CO) 3 ( N , S -heterocycle) ( 1 ) upon stirrin
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8bc070beaa12675adc7c2a254a6169f9
https://doi.org/10.1016/j.jorganchem.2005.07.074
https://doi.org/10.1016/j.jorganchem.2005.07.074
Autor:
Dong Han, David R. Glass, Vladimir N. Nesterov, David Wiedenfeld, Kila D. Nsamenang, Mark A. Minton
Publikováno v:
Synthesis. :1611-1618
A three-step procedure has been developed to convert substituted p-dimethoxybenzenes to quinone ammonium salts. Five examples of quinone ammonium salts have been prepared with this procedure. In the first step, the aromatic species is reacted with N-
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aacc82544dc71b8a018c21d89e9097d8
https://doi.org/10.1055/s-2005-865296
https://doi.org/10.1055/s-2005-865296
Publikováno v:
Journal of Fluorine Chemistry. 104:303-306
The syntheses of a series of fluorophores of the general formula: pyrene-(CF 2 ) n -pyrene ( n =3, 4 and 6) and pyrene-(CF 2 ) n -F ( n =4 and 6) are reported using two different methodologies. Copper catalyzed coupling of 1-bromopyrene and the corre
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::caccbdac59d04c99227b626017f91f0c
https://doi.org/10.1016/s0022-1139(00)00262-1
https://doi.org/10.1016/s0022-1139(00)00262-1
Publikováno v:
Coordination Chemistry Reviews. :875-886
Intramolecular electron transfer (ET) in [Ir 2 (μ-pz*) 2 (CO) 2 (Ph 2 PO(CH 2 ) 2 A + ) 2 ] [B(Ph) 4 − ] 2 ([IrPOpy + ] 2 ; pz*=3,5-dimethylpyrazolyl, A=pyridinium derivative, Ph=C 6 H 5 ) exhibits a Gaussian free-energy dependence. The temperatur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9e4f24117fd37e2437fece146d96363d
https://doi.org/10.1016/s0010-8545(00)00261-7
https://doi.org/10.1016/s0010-8545(00)00261-7
Publikováno v:
Journal of Chemical Crystallography. 29:955-959
Intramolecular hydrogen bonding in the solid state is reported for the title compound and its ethylene ketal. The title compound crystallizes in the triclinic space group, \(P\bar 1\) with a = 9.590(3), b = 9.620(3), c = 9.844(2) A, α = 97.67(2), β
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0fa2b85ae05495d3e2f35b3237178f47
https://doi.org/10.1023/a:1009538414801
https://doi.org/10.1023/a:1009538414801
Autor:
Max Bachrach, T. Mark McCleskey, Jay R. Winkler, Michael G. Hill, and Harry B. Gray, David Wiedenfeld
Publikováno v:
The Journal of Physical Chemistry B. 101:8823-8826
Intramolecular electron-transfer (ET) rates have been measured as functions of reaction driving force (0.0−2.0 eV) and temperature (200−280 K) for a series of iridium dimers (Ir2) covalently bound to substituted pyridinium (py+) groups. We found
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cad6122261964c467270eff33614de69
https://doi.org/10.1021/jp963984g
https://doi.org/10.1021/jp963984g
Publikováno v:
Tetrahedron Letters. 36:2707-2710
Two water soluble cyclophane dimers have been prepared, and their binding properties examined. With a range of bidentate guests, the affinities of the new dimeric cyclophanes were similar to those of the monomeric analog.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::641fe5968bcc626b678e4176dc37a443
https://doi.org/10.1016/0040-4039(95)00373-k
https://doi.org/10.1016/0040-4039(95)00373-k