¹²⁷I-NQR, ¹¹⁹ Sn Mössbauer Effect, and Electrical Conductivity of MSnI₃ (M = K, NH₄ , Rb, Cs, and CH₃NH₃ )

Abstract

In a series of MSnI

NQR and X-ray Studies of [N(CH3)4]3M2X9 and (CH3NH3)3M2X9 (M = Sb,Bi; X = Cl,Br)

“…The EFG at each cation site was calculated using Bertaut's method [14] with the structure parameters obtained, and electric charges +1.831 e for Bi, -0.797 e for bridging Br, -0.712e for terminal Br and + le for the cations, deduced from the NQR results. (1) for the terminal and bridging Br atoms, respectively [15], and the net charge is equal to 1 -N, for each Br atom. The results of the lattice summation, taken over a volume of ± six lattice constants in each direction, leads to the nuclear quadrupole coupling constants (NQCCs) of 3.54 KHz for 2 D at the point position 1 a and of 1.46 KHz for 2 D at 2d.…”

“…in Cs 3 Bi 2 Br 9 , [3], and the third one is built up of isolated M 2 X| e anions as found in [N(CH 3 ) 4 ] 3 Sb 2 Br 9 [4]. We tried to investigate the structures of A 3 M 2 X 9 in more detailed X-ray diffraction experiments and by observing NQR * Presented at the Xlth International Symposium on Nuclear Quadrupole Resonance Spectroscopy, London, United Kingdom, July [15][16][17][18][19]1991. Reprint requests to Dr. H. Ishihara, Dept.…”

Synthesis, crystal structure and characterization of two new organic bismuthate(III) compounds: [C6H18O]2Bi2X10·2H2O (X = Br, Cl)

“…The drawings were made with diamond [11] and ORTEPIII [12]. 2 Bi 2 Br 10 Á2H 2 O, 2, are isostructural and crystallize in triclinic system with P-1 space group. The asymmetric unit contains one N-(2-hydroxyethyl)piperazine-1,4-diium dication, one water molecule and one half of a decachloro/ bromo dibismuthate(III) dimer.…”

“…The weak peak at 1617 cm -1 and the strong at 1575 cm -1 are assigned to the OH bending modes of the hydroxyl group and water molecule, respectively. The peaks appearing in the range 1474-1322 cm -1 can be assigned to N-H bending mode of NH 2 ? and NH ?…”

“…Some of these hybrid materials stem from benefits introduced by the inclusion of both the inorganic and organic components into product. Of particular interest are organic bismuthates(III) materials due to their structural diversity, electronic and optical properties [1][2][3][4]. The characteristic feature of these compounds is a rich variety of the anionic stoichiometries.…”