𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Fragmentation of ion–molecule adducts of transition metal ions with aromatic ring-containing nitriles in the gas phase

✍ Scribed by Lin-Zhi Chen; Jack M. Miller

Publisher
John Wiley and Sons
Year
1992
Tongue
English
Weight
915 KB
Volume
27
Category
Article
ISSN
1076-5174

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Gas‐phase ion–molecule reactions of transition metal ions, M^+^ (M^+^ = Ni^+^, Co^+^, Fe^+^ and Mn^+^), with six aromatic ring‐containing nitriles were investigated in a modified fast atom bombardment (FAB) source. It is shown that the monoadduct, (Ph(CH~2~)~n~CN)–M^+^, is one of the most abundant ion–molecule reaction products. The main fragments in the FAB source are the [C~7~H~7~]^+^ and [C~8~H~9~]^+^ ions, and their formation is shown to involve metal ion insertion into the nitriles rather than direct bond cleavage from the ‘free’ or complexed nitriles after FAB ionization. An intramolecular oxidation–reduction reaction, giving [C~7~H~7~]^+^, is found in the metastable and collisionally induced dissociations of benzyl nitrile adducts accompanied by neutral MCN formation, but not seen for longer chain samples. An ortho effect is observed in the elimination of HCN from the 2‐methylbenzyl nitrile adduct ions. This reaction dominates the metastable ion spectrum of the adduct of Mn^+^, whereas metal detachment is nearly the major process for the other complexes of Mn^+^. The different bond‐insertion selectivities of the metal ions are also shown.

📜 SIMILAR VOLUMES

Relative metal ion affinities of organic
Relative metal ion affinities of organic nitriles in the gas phase
✍ Lin-Zhi Chen; Jack M. Miller 📂 Article 📅 1992 🏛 John Wiley and Sons 🌐 English ⚖ 928 KB

The relative metal ion (Ni' and Co') affinities of 14 alkanenitriles, alkenenitriles and benzonitrile were estimated using Cooks' kinetic method in a fast atom bombardment mass spectrometer. The results are compared with proton affinities, affinities for other metal ions, two-ligand dissociation ent

Activation of aromatic rings by early tr
Activation of aromatic rings by early transition metal ions in the gas phase. Implications for the metal-catalyzed [2 + 2 + 2] cycloaddition of alkynes and nitriles
✍ R. Marshall Pope; Steven W. Buckner 📂 Article 📅 1993 🏛 John Wiley and Sons 🌐 English ⚖ 538 KB

The reactions of a series of monocyclic and bicyclic arenes with early transition metal ions (Sc+, Y+, N b \* and Ta') and their oxides and dioxides were studied in a Fourier transform ion cyclotron resonance mass spectrometer. Ring cleavage of the nitrogen-containing heterocycles results in loss of

Gas-phase ion—molecule reaction in an RF
Gas-phase ion—molecule reaction in an RF ion trap. Reactivity of the 5d transition series of metal ions (Lu+, Hf+, Ta+, and W+) with O2
✍ Yukari Matsuo; Haruka Maeda; Michio Takami 📂 Article 📅 1993 🏛 Elsevier Science 🌐 English ⚖ 346 KB

Ions in an externally generated laser plasma of heavy metals have been directly confined in an RF ion trap and subjected to ion-molecule reactions. Trapped metal ions as well as their chemical reaction products have been detected with a quadrupole mass spectrometer. The first four ions of Sd transit

Ion-molecule reactions in a quadrupole i
Ion-molecule reactions in a quadrupole ion trap as a probe of the gas-phase structure of metal complexes
✍ Vachet, Richard W.; Hartman, Judith Ann R.; Callahan, John H. 📂 Article 📅 1998 🏛 John Wiley and Sons 🌐 English ⚖ 380 KB 👁 2 views

A method is described in which the coordination number in metal complexes can be determined using ion-molecule reactions in a quadrupole ion trap mass spectrometer. Complexes of Ðrst-row transition metals in the + 2 oxidation state, including manganese through zinc, are electrosprayed, isolated in t