Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Erratum: "The microwave spectrum and structure of the methanol⋅SO2 complex" [J. Chem. Phys. 103, 6440 (1995)] (1997)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 107 (1997), S. 8210-8210 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.475336
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Rotational spectrum, structure, and modeling of the HCCH–(OCS)2 trimer: Observation of a polar OCS dimer fragment (1999)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 111 (1999), S. 10511-10519 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The rotational spectra of eight isotopomers of the HCCH–(OCS)2 trimer have been assigned by pulsed nozzle, Fourier-transform microwave spectroscopy. The rotational constants and dipole moment components are consistent with a nonplanar, triangular-twisted structure of C1 symmetry which aligns the three monomer axes approximately 3°–27° away from perpendicular to a triangle formed by the center of HCCH and the carbons of OCS. The OCS dimer portion of the trimer has the two OCS monomers aligned in an almost parallel fashion such that the monomer dipole moments reinforce, rather than in the antiparallel arrangement observed in the well-known OCS dimer. This configuration has been obtained using a semiempirical model which employs a distributed multipole representation of the electrostatic interaction and analytical atom–atom terms to describe the dispersion and repulsion terms in the interaction potential. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.480404
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    (N2O)2⋅SO2: Rotational spectrum and structure of the first van der Waals trimer containing sulfur dioxide (2000)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 112 (2000), S. 8839-8846 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The trimer (N2O)2⋅SO2 has been studied by Fourier transform microwave spectroscopy. The rotational constants for the normal species are A=1369.1014(11) MHz, B=1115.5816(11) MHz, and C=730.5790(4) MHz. Five isotopomers of the complex have been studied, allowing a determination of its structure. The configuration aligns the centers-of-mass of the three monomers in an approximate equilateral triangle. The monomers twist relative to this plane so that the two N2O's are intermediate between T-shaped and crossed rather than the usual slipped-parallel planar. The SO2 is oriented so that its oxygens are straddling one N2O (similar to the N2O⋅SO2 dimer), while its sulfur is closest to the oxygen end of the other N2O. The dipole moment of (15N2O)2⋅SO2 was measured, giving μa=0.606(1) D, μb=1.256(2) D, μc=0.058(2) D, and μtotal=1.396(2) D. A semiempirical model has been used to predict the trimer structure, and comparison is made with this model as well as with the dimer N2O⋅SO2. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.481498
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Rotational spectrum and structure of the OCS–(CO2)2 trimer (1998)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 109 (1998), S. 5276-5282 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The rotational spectra of nine isotopes of the mixed trimer, OCS–(CO2)2, have been assigned using pulsed nozzle FTMW spectroscopy techniques. The structure resembles a distorted triangular cylinder. It can be thought of as the slipped (CO2)2 dimer with the OCS above the dimer and crossed about 23° to the axis of each CO2. The distance between the carbon atoms on the CO2 is 3.68(5) Å. The distance between the carbon on each CO2 and the carbon on the OCS is 3.59(5) and 3.66(5) Å, respectively. The axes of the linear molecules are tilted 30°–35° from perpendicular relative to the edges of the C–C–C plane. The dipole moment components for the trimer are μa=0.63(2) D, μb=0.16(10) D and μc=0.21(2) D. The structure and dipole moment components are consistent with an interaction model, which includes a distributed multipole moment electrostatic analysis and atom–atom terms describing dispersion and repulsion. The structure is compared to other related dimers and trimers containing CO2, OCS, and N2O. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.477145
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Rotational spectrum, structure and modeling of the SO2–CS2 complex (1999)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 110 (1999), S. 6804-6811 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The rotational spectra of seven isotopomers of the SO2–CS2 van der Waals dimer have been observed with a Fourier transform microwave spectrometer. The rotational constants for the normal species were determined to be A=2413.2000(3) MHz, B=1105.3803(3) MHz and C=884.9885(2) MHz. They are consistent with the SO2 straddling the CS2 molecule and Cs symmetry for the complex. The centers of mass of the two monomers are separated by 3.4287(2) Å. Two structures were found that are consistent with this symmetry which differ in the relative tilt of the CS2 and SO2. In both structures, the C2 axis of the SO2 is aligned close to parallel to the CS2 molecular axis with the oxygen end of the SO2 tipped closer to the CS2. In one structure the deviation from parallel is 9.8(8)° while in the other it is 17.7(11)°. The dipole moment components have been determined to be μa=0.0137(5) D and μb=1.1961(9) D. A semi-empirical model employing electrostatic, dispersion and repulsion interactions was employed to analyze the system and resulted in a reasonable reproduction of the angular geometry. A comparison of the results for the SO2–CS2 complex with the closely related SO2–CO2 and SO2–OCS complexes is presented. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.478584
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Structure of the propene⋅sulfur dioxide complex (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 100 (1994), S. 15-22 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The rotational spectra of eight isotopomers of the propene⋅SO2 complex have been observed with a Fourier transform microwave spectrometer. The rotational constants of the normal species are A=4269.564 MHz, B=1577.2661 MHz, and C=1469.6335 MHz. The structure of the complex was derived from least-squares fitting of the 24 moments of inertia. It has a stacked, near-parallel planes configuration. The distance between the centers of mass of the two monomers is 3.26(5) A(ring). The sulfur atom is approximately above the propene double bond. The C2 axis of SO2 nearly eclipses the carbon–carbon single bond with the oxygen atoms towards the methyl group. The dipole moment of the complex was determined by Stark effect measurements to be μ=1.34(3) D. The binding energy is estimated to be 2.9 kcal/mol from the pseudodiatomic model. Both electrostatic and ab initio calculations have been carried out to rationalize the structure and properties of the complex. The effect of methyl group substitution on the structures and properties of the ethylene⋅SO2, propene⋅SO2, and toluene⋅SO2 complexes is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.466987
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    The microwave spectrum, structure, and large amplitude motions of the methylacetylene⋅SO2 complex (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 6512-6522 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Rotational spectra of five isotopomers of the methylacetylene⋅SO2 (MA⋅SO2) van der Waals complex have been observed with a Fourier transform microwave spectrometer. Each species showed two sets of rotational transitions, one associated with the A (m=0) and the other with the E (m=±1) methyl group internal rotation states. The rotational transitions of the isotopomers with S 16O2 and the doubly substituted S 18O2 also showed inversion splitting ranging from tens of kHz to a few MHz. This splitting was absent in the S 16O 18O isotopomers. The spectra of these species have been assigned and fit, yielding rotational constants, which allowed a complete determination of the structure of the complex. The SO2 was found to sit above the carbon–carbon triple bond, with one of the S–O bonds roughly parallel to the symmetry axis of methylacetylene. The centers-of-mass distance between the two monomers was determined to be 3.382(10) A(ring). The center frequencies of the inversion doublets (or quartets) were used in a fit of both the A and the E transitions; the barrier hindering the internal rotation of the methyl group was determined to be 62.8(5) cm−1. Based on the dependence of the inversion splitting on the transition dipole direction and isotopic substitution, the inversion motion was identified as an "in plane'' wagging of the SO2 relative to methylacetylene. A pure inversion splitting of 3.11 MHz (free from rotation) was extracted from the A-state spectrum of the normal species, from which an inversion barrier height of about 63 cm−1 was estimated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.468345
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Microwave spectrum, structure, and dipole moment of difluorophosphine oxide (1968)
    s.l. : American Chemical Society
    Inorganic chemistry 7 (1968), S. 2582-2584 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic50070a023
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Formation and structure of ozonides (1983)
    s.l. : American Chemical Society
    Accounts of chemical research 16 (1983), S. 42-47 
    Details
    ISSN: 1520-4898
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ar00086a002
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Microwave spectra of trimethylamine-borane. Boron-nitrogen distance and molecular dipole moment (1975)
    s.l. : American Chemical Society
    Inorganic chemistry 14 (1975), S. 126-129 
    Details
    ISSN: 1520-510X
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ic50143a026
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...