Showing papers by "Galen D. Stucky published in 1970"
TL;DR: The single-crystal electron spin resonance spectra of (VII), Mn(II), and Ni(II) are reported in the diamagnetic lattice CsMgCl3 at 298 and 77°K.
Abstract: The single‐crystal electron spin resonance spectra of (VII), Mn(II), and Ni(II) are reported in the diamagnetic lattice CsMgCl3 at 298 and 77°K. The structure of the host lattice CsMgCl3 is also reported. The crystal system is hexagonal, space group P63/m mc. The basic structural feature is the linear array of [MgCl6]4− octahedra sharing faces directed along the hexagonal c axis. The crystallographic site symmetry at the Mg2+ ions is D3d. The spin resonance spectra of the doped salts Cs[Mg1−x, Vx]Cl3, Cs[Mg1−x, Mnx]Cl3, and Cs[Mg1−x, Nix]Cl3, where x is small, can be readily explained in terms of the axial field Hamiltonian: H = β[g‖HzSz + g⊥(HxSx + HySy)] + D[Sz2 − 13S(S + 1)] + ASzIz + B(SxIx + SyIy). The principal measured quantities are, respectively: V(II)(77°K), g‖ = 1.9740, g⊥ = 1.9760, D(gauss) = 931, A(gauss) = 82.3, B(gauss) = 79.8; Mn(II)(77°K), g‖ = 2.0016, g⊥ = 2.0015, D(gauss) = 313, A(gauss) = 86.5, B(gauss) = 86.5; Ni(II)(77°K), g‖ = 2.257, g⊥ = 2.241, D(gauss) = 18 980.
86 citations
45 citations
TL;DR: In this article, a (CH3)2Mg·2 NC7H13 was obtained from the reaction of dimethyl magnesium with 1-azabicyclo[2.2] octane (quinuclidine) in a benzene/hexane solution.
35 citations
TL;DR: In this paper, the powder susceptibility of CsNiCl3 has been measured from 1.3 to 130°K. The results, indicative of one-dimensional antiferromagnetic interactions, were used to test the onedimensional Ising model for spin unity, and the Fisher model utilizing the classical Hamiltonian for infinite spin.
Abstract: The powder susceptibility of CsNiCl3 has been measured from 1.3 to 130°K. The results, indicative of one‐dimensional antiferromagnetic interactions, are used to test the one‐dimensional Ising model for spin unity, and the Fisher model utilizing the classical Hamiltonian for infinite spin. The Fisher model with J = − 14.2k is found to give the better fit, but both models are found to deviate appreciably from the experimental results for kT less than J.
31 citations
TL;DR: The X-ray crystal structure of N-methyl-5,5-dimethyloxazolidine-2,4-dione (C603NH9) has been determined by the application of the direct method procedure as mentioned in this paper.
Abstract: The X-ray crystal structure of N-methyl-5,5-dimethyloxazolidine-2,4-dione (C603NH9) has been determined by the application of the direct method procedure. The crystals are monoclinic, space group P21/c (C~h), with four molecules in a unit cell of dimensions a= 6.449, b= 6-032, c= 19-639/~ and fl= 97.95 °. The basic five-membered oxazolidine ring is nearly planar. Two of the methyl groups are ordered, while the N-methyl group shows two preferred orientations. Full-matrix least-squares refinement gave a final weighted R index of 5.1% based on 1011 counter collected reflections.
2 citations