Halide anion discrimination by a tripodal hydroxylamine ligand in gas and condensed phases

Abstract

The binding of halide anions with a tripodal hydroxylamine ligand studied in gas (mass spectrometry and DFT methods) and condensed phases revealed notable agreement.

Proton affinities of pertechnetate (TcO4−) and perrhenate (ReO4−)

“…9 H 3 TriNOx presents three accessible hydroxyl moieties as potential H-bonding sites. 10 The strategy was to use electrospray ionization (ESI) to generate gas-phase complexes comprising TcO 4 À and/or ReO 4 À coordinated by H 3 TriNOx. It was anticipated that relative abundances of different complexes would reveal differences in efficacy of anion coordination by the ligand, and that collision induced dissociation (CID)…”

“…The structures here contrast with those previously reported for analogous species comprised of H 3 TriNOx and halide anions. 10 The complex [L(HClBr)] À , for example, is not a (Cl À )(H + )(Br À ) proton bound dimer coordinated by H 3 TriNOx. Instead, it is essentially a protonated H 4 TriNOx + coordinated by well-separated halide anions, Cl À and Br À .…”