Square-planar complexes of platinum(II) that luminesce in fluid solution

Funktionalisierte 1,1-Ethendithiolate als Liganden, II / Functionalized 1,1-Ethene Dithiolates as Ligands, II

“…Erst in jüngster Zeit wurde über einige Beispiele neuer Komplexe mit funktionalisierten 1,1-Ethendithio lat-Liganden wie [S2C=C(CN)COOEt]2~ [3] und [S2C =C H -C(0)C6EI5]2" [1] berichtet. Auch gelang uns die Synthese von Komplexen mit dem Dianion der /?-Hydroxydithioferrocenyl-und dem Tetraanion der Bis-l,l'-ß-hydroxydithioferrocenyl-Säure [4], Kristallstrukturanalysen bestätigen die Koordi nation eines (R3P)2M-Fragments (M = Pd, Pt) an die beiden Schwefelatome und eine annähernde Planarität des M(II)-Zentrums [1,4].…”

Introduction of Modified Electronic Parameters – Searching for a Unified Ligand Properties Scale through the Electrophilicity Index Concept

“…This assignment has been confirmed by TD-DFT calculations, [69][70][71][72] and both experimental [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34] and theoretical results [69][70][71][72] indicate that its frequency can be tuned from near-Vis to NIR by changing the substituents both at the diimine and dithiolate moieties. These complexes face a reversible, diimine-based, reduction process, which is well characterized.…”

Synthesis and analytical characterization of novel pyridyl‐substituted 1,1′‐ethenedithiolato complexes

“…According to the literature studies of free substituted β-hydroxydithiocinnamic acids and their esters [7,[9][10][11], the signals of the complexes should be shifted highfield due to their π-backbonding. This effect can be observed at least in the spectra of the 3-and 4-pyridyl substituted complexes 7-18, whose signals are detected between δ = 6.3 and 6.6.…”

“…In the complexes 1-18, the 13 C NMR spectra exhibit a downfield shifted single resonance of the methine carbon atoms within a range of δ = 117-120 with a 3 J C-Pt coupling (59-75 Hz) and a small 4 J C-P coupling (3.8-5.9 Hz). The C O signals appear at about δ = 186.0-193.5 and are shifted downfield in contrast to those in the uncoordinated dithioacids [7,[9][10][11]. Table 3 illustrates the different 13 C NMR signals and the coupling constants of the methine carbon atom.…”