Related Experiment Video
Updated: Jan 18, 2026

The Synthesis, Characterization and Reactivity of a Series of Ruthenium N-triphosPh Complexes
Published on: April 10, 2015
Thionitrosyl Complexes of Technetium and Rhenium with Sterically Encumbered m‑Terphenyl IsocyanidesSteric Bulk
Domenik Nowak1, Guilhem Claude1, Anna-Maria Tsirigoni1
1Freie Universität Berlin, Institute of Chemistry and Biochemistry, Fabeckstr. 34/36, Berlin D-14195, Germany.
None:
Low-valent thionitrosyl complexes of technetium and rhenium with the bulky isocyanides CNArTripp2, CNArDipp2, and CNArMes2 (Tripp = 2,4,6-triisopropylphenyl, Dipp = 2,6-diisopropylphenyl, Mes = 2,4,6-trimethylphenyl) have been synthesized by reactions of the corresponding nitridotechnetium-(V) or rhenium-(V) compounds with disulfur dichloride. The structures of the products and the oxidation states of the resulting metal ions are mainly controlled by the steric bulk of the terphenyl isocyanide ligands. Bis-(isocyanide) Tc-(II) and Re-(II) were obtained exclusively with CNArTripp2 or CNArDipp2, which is in contrast with the more diverse reaction outcomes with the less bulky CNArMes2, where the products also include metal-(I) and dimeric compounds. The obtained complexes [ReVNCl2(CNArTripp2)2(MeOH)], [ReVNCl2(CNArDipp2)2], [ReVNCl2(CNArMes2)3], [TcVNCl2(CNArTripp2)2], [ReII(NS)-Cl3(CNArTripp2)2], [ReII(NS)-Cl3(CNArDipp2)2], [ReI(NS)-Cl2(CNArMes2)3], [TcII(NS)-Cl3(CNArTripp2)2], [TcII(NS)-Cl3(CNArDipp2)2], [TcII(NS)-Cl2(CNArMes2)3]-Cl, and [{Tc-(NS)-Cl-(CNArMes2)2}2Cl2] were studied spectroscopically and partially by X-ray diffraction.
More Related Videos
Related Concept Videos
Radical Reactivity: Steric Effects
Along with electronic...
Crystal Field Theory - Tetrahedral and Square Planar Complexes
Crystal field theory (CFT) is applicable to molecules in geometries other than octahedral. In octahedral complexes, the lobes of the dx2−y2 and dz2 orbitals point directly at the ligands. For tetrahedral complexes, the d orbitals remain in place, but with only four ligands located between the axes. None of the orbitals points directly at the tetrahedral ligands. However, the dx2−y2 and dz2 orbitals (along the Cartesian axes) overlap with the ligands less than the dxy,...
Preparation and Reactions of Sulfides
Radical Reactivity: Concentration Effects
Directing and Steric Effects in Disubstituted Benzene Derivatives
Radical Reactivity: Intramolecular vs Intermolecular

