Vibrational spectra of organophosphorus compounds. III. Infrared and Raman spectra of dimethylphosphinothioic chloride, dimethylphosphinothioic bromide, and dimethylphosphinic chloride

Durig, J. R.; Wertz, D. W.; Mitchell, B.R.; Block, Frank E.; Greene, James M.

doi:10.1021/j100871a016

Cited by 18 publications

(4 citation statements)

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“…The infrared and Raman spectra of (CHa)2PSF are remarkably similar to those of (CHa)2PSC1 previously reported by Durig et al [14]. However, the assignment of the fundamental modes for the chlorine compound was based on depolarization data only and no information on the potential energy distributions for the normal modes were given.…”

Section: Vibrational Spectrasupporting

confidence: 81%

Spectra and structure of organophosphorus compounds: XLIX. Microwave, infrared, and Raman spectra, electric dipole moment, molecular structure, and ab initio calculations of dimethylphosphonothioic fluoride

Chatterjee

Durig

1994

Struct Chem

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The microwave spectra of (CH3)2PSF, (CH3)(CD3)PSF, (CD3)2PSP, and (CH3)2p34SF have been investigated from 20.0 to 40.0 GHz. Both a-type R branch and c-type Q branch transitions have been measured in the ground states of each isotopic species. From a least-square adjustment to fit 12 rotational constants, the following structural parameters were obtained: r(P--F) = 1.582 + 0.003 }k; r(P=S) = 1.902 ___ 0.001 .~.; r(P--C) = 1. (3200 to 100 cm -I) of each isotopic species have been measured for the solid, and liquid and qualitative depolarization values obtained. Additionally, the mid-infrared spectra (3200 to 500 cm -l) of the solids have been recorded. Proposed assignments of the normal modes have been made on the basis of Raman depolarization values and group frequencies which are supported by normal coordinate analysis utilizing an ab initio force field. Optimized structural parameters have been obtained with both the 3-21G* and 6-31G* basis sets. These results are compared to the corresponding quantities for several similar molecules.KEY WORDS: Dimethylphosphonothioic fluoride; microwave and vibrational spectra; structure; ab initio calculations. ~TRODUCTIONA considerable amount of structural data has been reported [1--4] on organ.phosphorus compounds of the type RP(X)F2 where R = CH3 or C2H 5 and X = O or S. A comparison of the P--F and P--X bond distances in these molecules with those of OPF 3 and SPF 3 reveals some interesting trends. It is observed that substitution of a F atom in OPF3 [5] or SPF 3 [6] by a CH~ or CzH 5 moiety results in an elongation of the remaining P--F t For part XLVIII, see J. Raman Spectrosc. 1922, 23, 107.

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Section: Vibrational Spectrasupporting

confidence: 81%

Spectra and structure of organophosphorus compounds: XLIX. Microwave, infrared, and Raman spectra, electric dipole moment, molecular structure, and ab initio calculations of dimethylphosphonothioic fluoride

Chatterjee

Durig

1994

Struct Chem

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“…In (CH3)3P these modes have been assigned to weak Raman lines at 973 and 948 cm-113 and in (CHa^POCl moderately strong infrared bands at 930, 906, and 865 cm-1 have been attributed to P(CHa) rocking motions. 16 In (CH3)3PNCH3 there are three moderately intense infrared bands in the frequency range of the P(CH3) rocking modes at 939, 868, and 829 cm-1. Corresponding Raman lines are observed for two of these bands at 945 and 818 cm"1.…”

Section: Introductionmentioning

confidence: 97%

Vibrational spectra, structure, and nature of the phosphorus-nitrogen double bond in N,P,P,P-tetramethylphosphine imide and N-methyl-d3-P,P,P-trimethylphosphine imide

Bragin¹,

Chan²,

Mazzola³

et al. 1973

J. Phys. Chem.

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The vibrational spectra of the compound N,P,P,P-tetramethylphosphine imide and its iV-methyl-d3 analog have been found to be consistent only with a Cs structure the vibrational potential function of which exhibits large deviations from local C3y symmetry at both phosphorus and nitrogen. All 48 vibrational fundamentals expected under Cs molecular point symmetry have been assigned based on group frequencies, isotopic frequency shifts, and Raman depolarization measurements. The P:N torsional modes have been assigned at 112 and 100 cm-1 in the light and heavy molecules, respectively, and threefold barriers of 2.06 and 2.42 kcal/mol, respectively, have been calculated from these assignments. The unusually low barrier to rotation around the formally double P:N bond confirms the results of low-temperature pmr studies of phosphine imides which indicate that the barrier to internal rotation in these molecules is below values reported for PN bond internal rotation in aminophosphines. The infrared spectrum of (CH3)3PNCH3 liquid at room temperature (4000-300 cm"1) and solid at -175°(4000-200 cm"1) and the Raman spectra of the light and N-methyl-d3 liquids are presented and these show no evidence of the existence of dimers in either the solid or liquid states.

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“…All indicative peaks for Cit-HAuNPs are mentioned earlier. Table 1 represents the functional group, and it quantifies wavenumber for Ac [48,49]. Ac, with a central phosphorus atom (P), has characteristic phosphoric (P�O), methyl thiol, methyl ether, and amide bonds (Figure 10).…”

Section: Colorimetric Detection Of Ac Figurementioning

confidence: 99%

Image Digitization of Colorimetric Detection of Acephate Based on Its Complexation with Citrate-Capped Gold Nanoparticles

Osman

Yunus

Ong

et al. 2020

Journal of Chemistry

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Acephate (Ac), an organophosphate (OP) insecticide, is very harmful to human and the environment. Conventional techniques of detection are sensitive and selective but relatively time-consuming, expensive, and require trained personnel. This paper describes the use of an image processing technique to digitize the red values (RVs) of the colour image of Ac-capped gold nanoparticles (Ac-Cit-AuNPs) complex captured using a digital microscope to improve the detection accuracy and precision. The formation of the suspension was characterised using laser test, ultraviolet-visible spectrophotometer (UV-Vis), high-resolution transmission electron microscope (HRTEM), and Fourier Transform infrared spectroscope (FTIR). The linear regression analysis revealed that the detection sensitivity improved as the smaller gold nanoparticles were used. For quantitative measurement using image processing, a good linear relationship (R2 = 0.9905 and 0.9924) for Cit-HAuNPs and Cit-MAuNPs, respectively, between the concentration of Ac and average red values was obtained in the range of 0–8 mM. The limit of detection (LOD) for Ac was found to be 0.3 mM and 0.4 mM for Cit-MAuNPs and Cit-HAuNPs, respectively.

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Vibrational spectra of organophosphorus compounds. III. Infrared and Raman spectra of dimethylphosphinothioic chloride, dimethylphosphinothioic bromide, and dimethylphosphinic chloride

Cited by 18 publications

References 0 publications

Spectra and structure of organophosphorus compounds: XLIX. Microwave, infrared, and Raman spectra, electric dipole moment, molecular structure, and ab initio calculations of dimethylphosphonothioic fluoride

Spectra and structure of organophosphorus compounds: XLIX. Microwave, infrared, and Raman spectra, electric dipole moment, molecular structure, and ab initio calculations of dimethylphosphonothioic fluoride

Vibrational spectra, structure, and nature of the phosphorus-nitrogen double bond in N,P,P,P-tetramethylphosphine imide and N-methyl-d3-P,P,P-trimethylphosphine imide

Image Digitization of Colorimetric Detection of Acephate Based on Its Complexation with Citrate-Capped Gold Nanoparticles

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