English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Pure isomers of X n B 10 H 10-n  2- ; X = Cl, Br, I; n = 1, 2; are isolated by ion exchange chromatography on diethylaminoethylcellulose. Their structures are determined by 11 B and  11 B { 1 H }NMR spectroscopy. There are characteristic chemical shifts due to apical and equatorial substituents, respectively. The highest field signals are explained by the antipodal effect. In contrast to theoretical predictions the experimental investigations show, that the successive electrophilic substitution preferably occurs on equatorial and not on apical B atoms. IR and Ram an spectra of the 2-XB 10 H 9  2- species are very similar in the ν(BH) and in the B 10-  cage absorption region. In the far infrared there are two characteristic bands, shifting to lower frequencies in the series Cl, Br, I, which are therefore assigned to (B 10 ) - X stretching and (B 10 ) - X deformation modes.

zeitschrift für naturforschung b

Darstellung, 11 B-NMR- und Schwingungsspektren isomerenreiner Halogenohydrodecaborate X n B 10 H 10- n  2- ; X = Cl, Br, I; n = 1, 2 / Preparation,  11 B NMR and Vibrational Spectra of Pure Isomeric Halohydrodecaborates X n B 10 H 10- n  2- ; X = Cl, Br, I; n = 1, 2