Infrared Spectra of Xanthate Compounds: Ii. Assignment of Vibrational Frequencies

Little, L. H.; Poling, G. W.; Leja, J.

doi:10.1139/v61-090

Cited by 89 publications

(29 citation statements)

References 3 publications

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“…The latter is assigned to modes of the -CS2-functional group. The spectrum shows slight differences in comparison to previously published data [49]. In particular, the absorption band around 1000 cm −1 can hardly be related to KBX.…”

Section: Atr Ft-ir Measurementscontrasting

confidence: 84%

Near-Field Optical Examination of Potassium n-Butyl Xanthate/Chalcopyrite Flotation Products

Firkala

Kuschewski²,

Nörenberg³

et al. 2018

Minerals

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Abstract:The present study introduces scattering-type scanning near-field infrared optical nanospectroscopy (s-SNIM) as a valuable and well-suited tool for spectrally fingerprinting n-butyl xanthate (KBX) molecules adsorbed to chalcopyrite (CCP) sample surfaces. The collector KBX is well known to float CCP and is used in beneficiation. We thus identified KBX reaction products both by IR optical far-and near-field techniques, applying attenuated total internal reflection Fourier-transform infrared spectroscopy (ATR FT-IR) in comparison to s-SNIM, respectively. The major KBX band around 880 cm −1 was probed in s-SNIM using both the tunable free-electron laser FELBE at the Helmholtz-Zentrum Dresden-Rossendorf facility, Germany, and table-top CO 2 laser illumination. We then were able to monitor the KBX agglomeration in patches <500 nm in diameter at the CCP surface, as well as nanospectroscopically identify the presence of KBX reaction products down to the 10 −4 M concentration.

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Section: Atr Ft-ir Measurementscontrasting

confidence: 84%

Near-Field Optical Examination of Potassium n-Butyl Xanthate/Chalcopyrite Flotation Products

Firkala

Kuschewski²,

Nörenberg³

et al. 2018

Minerals

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“…All attempts to recrystallize the diamagnetic red products from organic solvents resulted in the immediate appearance of the yellow CuXan. Chemical analyses (C 42.2, H 3.9, N 6.5%) of the red phen product while approximating to that required for CuXan,.phen (C 44.4, H 3.7, N 5.8%), is also consistent with the presence of an intimate mixture of CuXan.phen and dixanthogen (the latter being insoluble in water and readily identified by bands in its infrared spectrum (18)). These results can be rationalized by considering the potential data of Table 2.…”

Section: Resultssupporting

confidence: 58%

Reactions of Sodium N,N-Diethyldithiocarbamate and Potassium Ethyl Xanthate with some 3d Transition Metal Halides in the presence of 2,2′-Bipyridyl and 1,10-Phenanthroline

Holah¹,

Murphy²

1971

Can. J. Chem.

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The synthesis and some properties of ethylxanthate (Xan-) complexes, MXanz and MXan,-(M = manganese(I1) and iron(11)) are reported. Reactions between divalent metal halides (manganese, iron, cobalt, nickel, copper, and zinc) and Xan-and between the metal halides and N,N-diethyldithiocarbamate (dtc-) in the presence of nitrogen bases 1,lO-phenanthroline (phen) and 2,2'-bipyridyl (bipy) are described. The major products of these reactions are complexes of the type MXan,.Base and Mdtcz.Base (with notable exceptions). I n the former series with bipy, two different crystalline modifications of the manganese, iron, and cobalt complexes are formed, and copper(I1) is reduced to copper(1) by Xan-in the presence of both bases. In the nickel-dtc system with bipy, Nidtc, is produced, while with phen, the complex [Niphen3]dtcz is formed. The latter reacts very rapidly with methylene chloride. Cudtc, is produced from the copper(II)/base/dtc reactions.

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“…These results are hard to understand since one would expect an increase in C-0 frequency due to the different canonical structures Va, Vb, and Vc of the xanthate ion. I t is not clear whether we should again reverse the assignments of C-0 and C=S stretching frequencies in dialkyl dixanthogens (22). Although the arguments regarding the relationship between double bond character and C-0 and C=S group frequencies favor the low frequency assignment (1045-1010 cm-l) to C-0 and high frequency assignment (1270-12.55 cin-I) to C=S as reported by Shankaranarayana and Pate1 (23), it would still be very difficult to accept such a low frequency for C-0 stretching in structures of this type where one would expect "contiguous" C-0 bands (24).…”

Section: C=s Stretching Frequencymentioning

confidence: 95%

Contribution to the Infrared Spectra of Organosulphur Compounds

Rao¹,

Venkataraghavan²,

Kasturi³

1964

Can. J. Chem.

216

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Infrared spectra of various types of organosulphur compounds have been examined and group frequencies arising from C-S, S-S, N-S, 0-S, and C=S stretching vibrations ha\e been assigned and discussed. The C-S bands of thioketals and S-S bands of tri-and tetra-sulphides show splittings due to vibrational coupling. The 0-S and N-S stretching frequencies are found around 890 and 820 cm-' respectively, values which are much higher than the C-S stretching frequencies. Potassium alkyl xanthates exhibit the asymmetric and symmetric stretching frequencies of the CS2-ion. The splitting of C-0 and C=S stretching bands in dialkyl dixanthogens have been interpreted in terms of the Fermi interaction with the combination tone of C-S and S-S stretching vibrations and with the overtone of S-S stretching vibrations respectively. The relative intensity of the C=S stretching bands in a few derivatives show marked dependence on the electronegativities of the elements directly

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Infrared Spectra of Xanthate Compounds: Ii. Assignment of Vibrational Frequencies

Cited by 89 publications

References 3 publications

Near-Field Optical Examination of Potassium n-Butyl Xanthate/Chalcopyrite Flotation Products

Near-Field Optical Examination of Potassium n-Butyl Xanthate/Chalcopyrite Flotation Products

Reactions of Sodium N,N-Diethyldithiocarbamate and Potassium Ethyl Xanthate with some 3d Transition Metal Halides in the presence of 2,2′-Bipyridyl and 1,10-Phenanthroline

Contribution to the Infrared Spectra of Organosulphur Compounds

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