Tsutomu Okuda

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In a series of MSnI3 compounds (M = K, NH 4 , Rb, Cs, CH 3 NH 3 ) two types of coordination around the central Sn(II) were found by I-NQR and powder X-ray diffraction techniques. They are square pyramidal (for M = NH 4 , Rb) and octahedral (for M = CH3NH3) . CsSnI3, on the other hand, showed a drastic structural change of the anion at 425 K from a square(More)
Structure and bonding properties of InBrx (In5Br7, In2Br3, In4Br7 and InBr2) were studied by Br and In NQR, and In NMR. The ethane-like [Br3In -InBr3] 2 anion was confirmed in In5Br7 or In2Br3 by Br NQR and the anion was characterized by the high quadrupole coupling constant at the In site ( 2 350 MHz). On the other hand, In4Br7 showed successive phase(More)
1 3 C C P / M A S N M R spectra were measured on the layered compounds [ C 6 H 5 C H 2 C H 2 N H 3 ] 2 [CH 3 NH 3 ] n _ 1Pb„I 3 n + j (w = 1, 2). The linewidth of the resonance peak corresponding to the phenyl carbons changed with temperature. The maximum broadening took place at 363 K for both compounds. The activation energy £ a for the reorientation of(More)
NQR and powder X-ray diffraction were observed for several bromoantimonate (III) complexes which contain C„H2n+ jNF^ (n = 1 -3 ) or (C„H2lt + 1)2N H 2 (n = 1 -4 ) as a cation. The bond character, anion structure, crystal structure, and phase transition are discussed on the basis of the three-centerfour-electron bond. A good correlation was found between the(More)
A series of trichlorogermanate(II) salts (AGeCl3, A = Rb, Cs, C H 3N H 3, and (CH 3)4N) have been synthesized and characterized by 35C1 NQ R, 35C1 NM R, AC conductivity, DTA, and X-ray diffrac­ tion techniques. In the temperature range studied two, two, five, and four phases were confirmed for the Rb, Cs, C H 3N H 3, and (CH 3)4N salts, respectively. From(More)
The temperature dependences at 110 to 400 K of the : H spin-lattice relaxation time ( 7 \ ) of the phenethylammonium ion in phenethylammonium lead(II) halides, [ C 6 H 5 C H 2 C H 2 N H 3 ] 2 P b X 4 (X = C1, Br, I), revealed that this ion shows reorientation of the N H 3 moiety around the three-fold axis and torsional motion of the alkyl chain (CH 2CH 2 )(More)
Li3InBr6 and NaInBr4 have been synthesized and characterized by means of DTA, 8 'Br NQR, Li, Li, Na, and l l In NMR, and AC conductivity. These measurements revealed the presence of phase transitions and cationic diffusion in both compounds. From the spin-lattice relaxation times of 1 Br NQR and the peak widths of Li and Na NMR spectra, it is deduced that(More)
Ionic m o t i o n and local s t ruc ture of p h e n e t h y l a m m o n i u m ion ( C 6 H 5 C H , C H 2 N H 3 + ) in a ser ies of p h e n e t h y l a m m o n i u m lead(I I ) ha l ides , [ C 6 H 5 C H 2 C H 2 N H 3 ] 2 P b X 4 (X = Cl , Br, I) w e r e s tudied by m e a n s of 1 3 C cross po la r i za t ion /mag ic ang le s a m p l e sp inn ing ( C P / M A S(More)
T sutom u O kuda*, Koji Y am ada, H ideta Ishihara, and Sumio Ichiba D epartm ent of Chemistry, Faculty of Science, Hiroshima University, Naka-ku, Hiroshima 730 Japan Z. Naturforsch. 42b, 835 — 838 (1987); received February 24. 1987 N QR Spectra, Molecular Complex, Charge Transfer, Acetonitrile Complex NQR spectra were observed in the 1:1 complexes of CH3CN(More)
NMR, NQR, powder X-ray diffraction, DTA and AC conductivity were measured in RMBr4 (R = Ag, Cu; M = Al, Ga) and RM2Br7 (R = Li, Ag; M = Al, Ga). In RMBr4, the activation energy of Cu diffusion was evaluated fromCu NMR and was in good agreement with that fromBr NQR. In CuAlBr4, the e Qq/h value of Cu NMR and the value of Al NMR changed linearly with(More)