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

In order to study the properties of sulfur coordinated transition metal centers, [Mo(NO)(Cl)(dttd)] (1) (dttd 2-  = 2,3,8,9-dibenzo-1,4,7,10-tetrathiadecane(2 -)) was synthesized. It shows no reaction with AgPF 6 , but it reacts very rapidly even at low temperatures with liquid ammonia and dialkylamines HNR 2  (HNMe 2 , HNEt 2 ) yielding the corresponding amidocomplexes [Mo(NO)(NR 2 )(dttd)] (R = H 4, Me 2, Et 3). For these reactions an associative mechanism is suggested. X-ray structure analyses of [Mo(NO)(Cl)(dttd)] (1) and [Mo(NO)(NMe 2 )(dttd)] (2) show the Mo centers to be coordinated pseudo-octahedrally by two trans thiolato S, two cis thioether S atoms and the two cis coligands NO and Cl or NO and NMe: , respectively. Both dialkylamido complexes (R = Me 2, Et 3) show no coalescence of the two N(alkyl) signals in the  1 H NMR spectra up to 140 °C, the NH-Signals of 4 coalesce at 70 ± 5 °C (⊿G* = 73 ± 1.5 kJ mol -1 ). The amido ligands act as σ - π four electron donor ligands such that the Mo center obtains a formal 18 electron configuration and the Mo-NR 2  bond represents a Mo = N double bond. This follows from the short Mo-N distance (192.4(8) pm) and the planarity of the N(alkyl) atom of 2 as well as the stability of the Mo - NR 2  bond (R = H, M e, Et) with respect to rotation. Since sterical effects can be excluded, the high rotation barriers must be due to exclusively electronic effects.

zeitschrift für naturforschung b

Übergangsmetallkomplexe mit Schwefelliganden, XLII. [Mo(NO)(NR 2 )(dttd)]: Metall—Amido-Komplexe mit rotationsstabilen M—NR 2 -Doppelbindungen (R = H, Me, Et; dttd 2-  = 2,3,8,9-Dibenzo-1,4,7,10-tetrathiadecan(2—)); Synthese, Eigenschaften und Röntgenstrukturanalyse/Transition Metal Complexes with Sulfur Ligands, XLII. [Mo(NO)(NR 2 )(dttd)]: Metal Amido Complexes with Rotationally Stable M—NR 2  Double Bonds (R = H, Me, Et; dttd 2-  = 2,3,8,9-Dibenzo-1,4,7,10-tetrathiadecane(2—)); Synthesis, Properties and X-Ray Structures