Evidence for the formation of acyclic ions from the radical cations and cyclic ions from the protonated molecules of ¿,¿-diamines upon loss of ammonia

Ana M. Fernandes, A.J. Ferrer Correia, R.H. Fokkens, N.M.M. Nibbering

    Research output: Contribution to journalArticleAcademicpeer-review

    2 Citations (Scopus)

    Abstract

    The structural characterization of the ions generated by the electron ionization-induced loss of ammonia from the molecular ions of α,ω-diamines, using ion/molecule reactions in combination with collision-induced dissociation (CID) studies, is described. The results of the experiments of ion/molecule reactions using dimethyl disulfide exclude the distonic radical cation structure for those long-lived ions proposed earlier by other authors for ions generated within a few microseconds following ionization. The unimolecular and CID characteristics of the ions [M---NH3]√+ of 1,4-diaminobutane and 1,5-diaminopentane and of their fragment ion m/z=56, are discussed in terms of the structures CH3CH2CH=CHNH2√+ and CH3CH2CH2CH=CHNH2√+ for the ions [M---NH3]√+, respectively. The structure of the closed shell ions resulting from loss of ammonia from the protonated α,ω-diamines was also probed through the CID spectra of model ions prepared by chemical ionization with methane in the chemical ionization source of the mass spectrometer.
    Original languageUndefined
    Pages (from-to)55-63
    JournalInternational journal of mass spectrometry
    Volume217
    Issue number1-3
    DOIs
    Publication statusPublished - 2002

    Keywords

    • Ammonia loss
    • Collision-induced dissociation
    • Ion structures
    • IR-74723
    • METIS-209406
    • α
    • ω-Diamines
    • Ion/molecule reactions

    Cite this

    @article{91ade64799e6441cada19c8720bbf1fe,
    title = "Evidence for the formation of acyclic ions from the radical cations and cyclic ions from the protonated molecules of ¿,¿-diamines upon loss of ammonia",
    abstract = "The structural characterization of the ions generated by the electron ionization-induced loss of ammonia from the molecular ions of α,ω-diamines, using ion/molecule reactions in combination with collision-induced dissociation (CID) studies, is described. The results of the experiments of ion/molecule reactions using dimethyl disulfide exclude the distonic radical cation structure for those long-lived ions proposed earlier by other authors for ions generated within a few microseconds following ionization. The unimolecular and CID characteristics of the ions [M---NH3]√+ of 1,4-diaminobutane and 1,5-diaminopentane and of their fragment ion m/z=56, are discussed in terms of the structures CH3CH2CH=CHNH2√+ and CH3CH2CH2CH=CHNH2√+ for the ions [M---NH3]√+, respectively. The structure of the closed shell ions resulting from loss of ammonia from the protonated α,ω-diamines was also probed through the CID spectra of model ions prepared by chemical ionization with methane in the chemical ionization source of the mass spectrometer.",
    keywords = "Ammonia loss, Collision-induced dissociation, Ion structures, IR-74723, METIS-209406, α, ω-Diamines, Ion/molecule reactions",
    author = "Fernandes, {Ana M.} and Correia, {A.J. Ferrer} and R.H. Fokkens and N.M.M. Nibbering",
    note = "staflijst nr. 12",
    year = "2002",
    doi = "10.1016/S1387-3806(02)00535-3",
    language = "Undefined",
    volume = "217",
    pages = "55--63",
    journal = "International journal of mass spectrometry",
    issn = "1387-3806",
    publisher = "Elsevier",
    number = "1-3",

    }

    Evidence for the formation of acyclic ions from the radical cations and cyclic ions from the protonated molecules of ¿,¿-diamines upon loss of ammonia. / Fernandes, Ana M.; Correia, A.J. Ferrer; Fokkens, R.H.; Nibbering, N.M.M.

    In: International journal of mass spectrometry, Vol. 217, No. 1-3, 2002, p. 55-63.

    Research output: Contribution to journalArticleAcademicpeer-review

    TY - JOUR

    T1 - Evidence for the formation of acyclic ions from the radical cations and cyclic ions from the protonated molecules of ¿,¿-diamines upon loss of ammonia

    AU - Fernandes, Ana M.

    AU - Correia, A.J. Ferrer

    AU - Fokkens, R.H.

    AU - Nibbering, N.M.M.

    N1 - staflijst nr. 12

    PY - 2002

    Y1 - 2002

    N2 - The structural characterization of the ions generated by the electron ionization-induced loss of ammonia from the molecular ions of α,ω-diamines, using ion/molecule reactions in combination with collision-induced dissociation (CID) studies, is described. The results of the experiments of ion/molecule reactions using dimethyl disulfide exclude the distonic radical cation structure for those long-lived ions proposed earlier by other authors for ions generated within a few microseconds following ionization. The unimolecular and CID characteristics of the ions [M---NH3]√+ of 1,4-diaminobutane and 1,5-diaminopentane and of their fragment ion m/z=56, are discussed in terms of the structures CH3CH2CH=CHNH2√+ and CH3CH2CH2CH=CHNH2√+ for the ions [M---NH3]√+, respectively. The structure of the closed shell ions resulting from loss of ammonia from the protonated α,ω-diamines was also probed through the CID spectra of model ions prepared by chemical ionization with methane in the chemical ionization source of the mass spectrometer.

    AB - The structural characterization of the ions generated by the electron ionization-induced loss of ammonia from the molecular ions of α,ω-diamines, using ion/molecule reactions in combination with collision-induced dissociation (CID) studies, is described. The results of the experiments of ion/molecule reactions using dimethyl disulfide exclude the distonic radical cation structure for those long-lived ions proposed earlier by other authors for ions generated within a few microseconds following ionization. The unimolecular and CID characteristics of the ions [M---NH3]√+ of 1,4-diaminobutane and 1,5-diaminopentane and of their fragment ion m/z=56, are discussed in terms of the structures CH3CH2CH=CHNH2√+ and CH3CH2CH2CH=CHNH2√+ for the ions [M---NH3]√+, respectively. The structure of the closed shell ions resulting from loss of ammonia from the protonated α,ω-diamines was also probed through the CID spectra of model ions prepared by chemical ionization with methane in the chemical ionization source of the mass spectrometer.

    KW - Ammonia loss

    KW - Collision-induced dissociation

    KW - Ion structures

    KW - IR-74723

    KW - METIS-209406

    KW - α

    KW - ω-Diamines

    KW - Ion/molecule reactions

    U2 - 10.1016/S1387-3806(02)00535-3

    DO - 10.1016/S1387-3806(02)00535-3

    M3 - Article

    VL - 217

    SP - 55

    EP - 63

    JO - International journal of mass spectrometry

    JF - International journal of mass spectrometry

    SN - 1387-3806

    IS - 1-3

    ER -