Investigations of solid-state ion exchange in zeolites by far infrared spectroscopy

1994 ◽  
Vol 0 (11) ◽  
pp. 1319-1320 ◽  
Author(s):  
Hauke Esemann ◽  
Horst Förster
Keyword(s):  
Infrared Spectroscopy ◽  
Solid State ◽  
Ion Exchange ◽  
Far Infrared ◽  
Far Infrared Spectroscopy

Vibrational spectra of adducts of iodine monochloride with some pyridine bases

1980 ◽  
Vol 33 (8) ◽  
pp. 1743 ◽  
Author(s):  
GA Bowmaker ◽  
K Tan ◽  
MJ Taylor
Keyword(s):  
Infrared Spectroscopy ◽  
Solid State ◽  
Far Infrared ◽  
Pyridine Derivative ◽  
Iodine Monochloride ◽  
Far Infrared Spectroscopy ◽  
Model Yield ◽  
Pyridine Bases ◽  
Yield Information ◽  
Structure And Bonding

A series of molecular adducts, L-ICl, where L = pyridine or a pyridine derivative, have been prepared and the solid state spectra examined by Raman and far-infrared spectroscopy. Assignments of the modes v(I-Cl) 240-300 cm-1 and v(N-I) 90-180 cm-1 and force constant calculations on a simple three-centre model yield information on structure and bonding related to the nature of the pyridine donor. Several ionic products containing the Icl2- ion have been encountered.

Synthesis, Structures and Spectroscopic Properties of 1 : 1 Complexes of Gold(I) Halides with Trimesitylphosphine

2000 ◽  
Vol 53 (3) ◽  
pp. 175 ◽  
Author(s):  
Raymond C. Bott ◽  
Graham A. Bowmaker ◽  
Robbie W. Buckley ◽  
Peter C. Healy ◽  
M. C. Senake Perera
Keyword(s):  
Infrared Spectroscopy ◽  
Solid State ◽  
Far Infrared ◽  
Spectroscopic Properties ◽  
Far Infrared Spectroscopy ◽  
Space Group ◽  
X Ray ◽  
Bond Lengths ◽  
Structure Determinations ◽  
Far Infrared Spectra

Monomeric two-coordinate gold(I) complexes, [Au(P(mes)3)X] (P(mes)3 = tris(2,4,6-trimethylphenyl)phosphine, X = Cl, Br and I), have been prepared and characterized by single-crystal X-ray structure determinations, far-infrared spectroscopy and solution and solid-state CPMAS 31 P n.m.r. spectroscopy. X-Ray structure determinations show that crystals obtained from solutions of [NBu4] [AuX2] and P(mes)3 in acetonitrile for X = Cl, Br and I and in dimethylformamide (dmf) for X = Br and I form an isomorphous series of complexes, crystallizing in space group P21/c with a ª 8, b ª 22, c ª 13 Å, b ª 98˚ (a form). Crystallization of the chloride from dimethylformamide yields the solvated complex [Au(P(mes)3)X]·(dmf) in space group P2/a with a 15.224(2), b 10.070(1), c 18.210(4) Å, b 100.42(2)˚. Electrochemical synthesis of the complexes for X = Cl and Br yield two new crystalline phases; the chloride in space group P21/c with a 10.249(2), b 8.189(2), c 31.844(3) Å, b 91.68(1)˚ (b form) and the bromide in space group Pbca with a 19.208(4), b 15.586(3), c 16.962(4) Å ( g form). The Au–P bond lengths increase in the order Cl < Br < I with distances c. 0.02–0.03 Å longer than average values for other [Au(PR3)X] complexes, reflecting steric congestion by the P(mes)3 ligand. For the unsolvated complexes, the Au–X distances are c. 0.02 Å shorter than average values. For the Cl/dmf solvate, both Au–P and Au–X bond lengths increase. For the a complexes, far-infrared spectra show n(Au 35,37 Cl) 336, 329 cm –1 , n(AuBr) 234 cm –1 and n(AuI) 195 cm –1 and solid-state 31 P CPMAS n.m.r. spectra yield broad peaks with d–3.9 (Cl), –0.6 (Br) and +6.0 I). For the Cl/dmf solvate, n(Au 35,37 Cl) are 334, 327 cm –1 and d is –4.4. Solution 31 P n.m.r. spectra in CDCl3 give sharp single peaks at d –5.0 (Cl), –1.4 (Br) and +5.5 (I) with the similarity of the values with those for the solid-state spectra consistent with similar conformational structures for the [Au(P(mes)3)X] molecules in the two states.

scholarly journals Synchrotron-Based High Resolution Far-Infrared Spectroscopy of trans-Butadiene

2020 ◽  
Vol 124 (12) ◽  
pp. 2427-2435 ◽  
Author(s):  
Marie-Aline Martin-Drumel ◽  
Jessica P. Porterfield ◽  
Manuel Goubet ◽  
Pierre Asselin ◽  
Robert Georges ◽  
...  
Keyword(s):  
Infrared Spectroscopy ◽  
High Resolution ◽  
Far Infrared ◽  
Far Infrared Spectroscopy
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