Willi Kantlehner

  • Citations Per Year
Learn More
A 7.4% power conversion efficiency at air mass (AM) 1.5 full sunlight was reached with a mesoscopic solar cell employing a new binary ionic liquid electrolyte composed of 1-propyl-3-methylimidazolium iodide and 1-ethyl-3-methylimidazolium tricyanomethanide in conjunction with the amphiphilic ruthenium complex NaRu(4-carboxylic(More)
In the title compound, C17H21N3O, the C-N bond lengths in the guanidine unit are 1.2889 (19), 1.3682 (19) and 1.408 (2) Å, indicating double- and single-bond character. The N-C-N angles are 115.10 (13), 119.29 (15) and 125.61 (14)°, showing a deviation of the CN3 plane from an ideal trigonal-planar geometry. In the crystal, non-classical C-H⋯O hydrogen(More)
The reaction of 3,3,3-tris-(dimethyl-amino)-1-phenyl-prop-1-yne with bromine in pentane yields the title compound, C(13)H(17)N(2) (+)·Br(-). The acetyl-enic bond distance [1.197 (2) Å] is consistent with a C C triple bond. The amidinium C=N bonds [1.325 (2) and 1.330 (2) Å] have double-bond character and the positive charge is delocalized between the two(More)
The reaction of the ortho-amide 1,1,1-tris-(di-methyl-amino)-4-methyl-4-(tri-methyl-sil-yloxy)pent-2-yne with bromine in benzene, yields the title salt, C15H33BrN3OSi(+)·Br(-). The C-N bond lengths in the amidinium unit are 1.319 (6) and 1.333 (6) Å, indicating double-bond character, pointing towards charge delocalization within the NCN plane. The C-Br bond(More)
Willi Kantlehnera,b, Markus Wezsteina, Ralf Kreßb, Franziska Zschacha, Jens Vettera, Georg Zieglera, Jochen Mezgera, Edmont V. Stoyanova, Alain Goepperta,c, and Jean Sommerc a Fachbereich Chemie/Organische Chemie, Fachhochschule Aalen, Beethovenstr. 1, D-73430 Aalen b Institut für Organische Chemie, Universität Stuttgart, Pfaffenwaldring 55, D-70569(More)
The asymmetric unit of the title hydrated salt, C15H37N6 (3+)·2Br(-)·OH(-)·H2O, contains one cation, three partial-occupancy bromide ions, one hydroxide ion and one water mol-ecule. Refinement of the site-occupancy factors of the three disordered bromide ions converges with occupancies 0.701 (2), 0.831 (2) and 0.456 (2) summing to approximately two bromide(More)
In the title salt, C16H34N5O3 (+)·C24H20B(-), the C-N bond lengths in the cation are 1.3368 (16), 1.3375 (18) and 1.3594 (17) Å, indicating partial double-bond character. The central C atom is bonded to the three N atoms in a nearly ideal trigonal-planar geometry and the positive charge is delocal-ized in the CN3 plane. In the crystal, weak C-H⋯O contacts(More)
Z. Naturforsch. 56 b, 1172-1177 (2001); received July 13, 2001 Aryl Formates, Formylation, Hydroxyarenes Aryl formates 4a-u, 6 , 8 , 10, 12, 14, 16, 18, 20, 22, 24, 26 are prepared by formylation of hydroxyarenes 3a-u, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25 with /V,Af-diformylacetamide (1) or triformamide (2), respectively, in fairly good yields. The(More)
A method for the preparation of the first acetylenedicarboxamidinium salt from a bis-orthoamide derivative of acetylenedicarboxyclic acid has been established. The salt reacted with cyclopentadiene and furan at room temperature to give bicyclic [4+2]-cycloaddition products. The solid compounds were characterized by solution NMR spectroscopy and by(More)
The title compound, C7H10O5, was synthesized by reaction of d-xylose with paraformaldehyde. In the crystal, the central part of the mol-ecule consists of a five-membered C4O ring with an envelope conformation, with the methine C atom adjacent to the O atom being the flap. The protected O atoms of both cyclic acetal groups are oriented so that the four(More)