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/

Zendy Plus

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

Zendy Tools

Zendy Open

We previously demonstrated that the δ NMR chemical shift of central NMR active atoms (A), in simple halido [AX n ] (A=C, Si, Ge, Sn, Pb, Pt; X n  = combination of n halides, n = 4 or 6) derivatives, could be directly related to X radii overall sum, Σ( r  L   ). Further correlation have also been observed for tetrahedral [AX 4 ] (A=C, Si; X 4  = combination of four halides) compounds where the X Pauling electronegativities sum,Σ  (   χ  L   Pau    )  ,    $\Sigma (\chi _L^{{\rm{Pau}}}),$    exceeds a specific value (≈12.4). In this work, we focused on these latter systems considering the H vs. X substitution. The analysis of the literature reported δ( 13 C) and δ( 29 Si) NMR chemical shift for the mono hydrogenated derivatives and in particular for [CHF 3 ] and [SiHF 3 ], characterized by the lowest Σ( r  L   ) and the highestΣ  (   χ  L   Pau    )  ,    $\Sigma (\chi _L^{{\rm{Pau}}}),$    suggests a revised value for the H electronegativity ranking with respect to Pauling’s.

Is hydrogen electronegativity higher than Pauling’s value? New clues from the 13 C and 29 Si NMR chemical shifts of [CHF 3 ] and [SiHF 3 ] molecules