Zobrazeno 1 - 10
of 114
pro vyhledávání: '"Albert T. H. Lenstra"'
Publikováno v:
Recueil des Travaux Chimiques des Pays-Bas. 108:133-138
5,7-Dimethyl[1,2,4]triazolo[1,5-a]pyrimidine (dmtp) has been used as a ligand for nickel(II) and cobalt(II) chloride, bromide, iodide and triiodide. The halides yield compounds of composition trans-[M(dmtp)2(H2O)4](H2O)2X2, the triiodides having the
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 96:575-580
[Co(C4H7N2O2)2 (H2O)2]ClO4, Mr = 424.7, C2/c, a = 21.344(5), b = 5.980(2), c = 13.707(2)A, β = 113.08(1)°, V = 1609.5(1)A3, Z = 4, Dx = 1.744 Mg m−3, Mo Kα, λ = 0.71069A, μ = 1.28 mm−1, F(000) = 872, room temperature, wR = 0.068 for 975 refl
Autor:
W. Van Havere, Albert T. H. Lenstra
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 89:427-431
The title compound Ni2+ (C4H5O5)2−. 4H2O crystallizes in the tetragonal space group P41212 with Z = 4. At ∼ 300°K, the œll constants are: a = 7.49(1)A, c = 27.40(1)A. The central skeleton has an “anti” conformation.
Autor:
M. M. Doesburg, Albert T. H. Lenstra
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 92:249-255
Na+C4H5O5− crystallizes in the monoclinic space group Pa with Z=4. The unit cell is given by a=10.074(4)A, b=6.032(2)A, c=10.338(4)A and β=120.11(2)°. The OOC-CH2-CHOH-COO chain has the gauche conformation in contrast to the trans conformation ob
Autor:
Albert T. H. Lenstra
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 88:359-368
The residual ( / is a very useful function in structure evaluation procedures. Using simple properties of the Patterson function algebraic expressions for the residual are derived. It is shown that the numerical value depends on various factors such
Autor:
M. De Wolf, Albert T. H. Lenstra
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 93:437-444
A description is given of (i) tests for the stability and performance of the diffractometer, in particular the mechanical wear and tear, (ii) the influence of wavelength dispersion and mosaic spread on the determination of scan parameters and (iii) e
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 88:133-141
The title compound crystallizes in P1, with a = 6.999 A, b = 7.491 A, c = 12.711 A, α = 91.1 °, β = 106.5 °, y = 90.1 ° and Z = 2. The structure was solved by rotation and translation search procedures and refined to a final R-value of 0.053. Ex
Autor:
Albert T. H. Lenstra, G. H. Petit
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 86:749-755
Using a Mo-tube two data sets were collected from an ammonium hydrogen malate crystal. The first set was collected using the traditional Zr-filter. The second one was obtained using a graphite monochromator. The differences in the corresponding inten
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 99:797-801
C16H20N2, M = 240.35, monoclinic, P21/n, a = 6.800(1), b = 6.833(2), c = 14.427(2)A,β = 97.55(1)°, V = 664.5(4)A)−3, Z = 2, Dx = 1.202 g cm−3, μ = 1.33 cm−1, λ(Mo-Kα) = 0.71073A, F(000) = 520, room temperature, R = 0.079, wR = 0.080 for 11
Publikováno v:
Bulletin des Sociétés Chimiques Belges. 94:705-712
Pd C16 H22 N4S4, Mr=505.0, monoclinic, P/c, Z=4, a=14.880(8), b=8.100(5), c=17.876(6) A, B=110.50(4)A at 150 K, V=2018(3)A3, Dx=1.66 Mg m−3, λ(MoK)=0.7107 A, μ=1.306 mm−1, crystal size 0.1×0.1×0.2 cm., F(000)=1024, Rw=0.10 for 2178 reflection