Search

Starting from C6H4(PCl2)2 and the TMS‐substituted ylide (TMS)2C=PR3 (TMS=trimethylsilyl, R=p‐tolyl), the phosphonium‐substituted diphosphaindenylide PPI was prepared in two steps. CASSCF calculations as well as the reactivity toward diphenyl acetylene suggest a notable biradical character in PPI. Reaction with [Cr(CO)3(MeCN)3] affords the complex [Cr(CO)3(η5‐PPI)] (5). This complex was employed to explore the ligand properties of PPI, which demonstrates considerable potential through the combination of strong metal‐ligand interactions and the possibility of a pronounced indenyl effect. [ABSTRACT FROM AUTHOR]

Invited for the cover of this issue is the group of Peter Coburger at the Technical University of Munich. The image, painted by Dr. Christoph Selg, depicts the bonding relationships in a biradicaloid chromium complex as a staircase, with the people symbolizing the two‐way flow of electrons between the ligand and the metal. Read the full text of the article at 10.1002/chem.202302970.“We were delighted to successfully obtain the phosphonium‐substituted diphosphaindenylide PPI, which demonstrated excellent π‐acceptor behavior.” This and more about the story behind the front cover can be found in the article at 10.1002/chem.202302970). [ABSTRACT FROM AUTHOR]

This article, titled "Phosphonium-substituted Diphosphaindenylide (PPI): Exploration of Biradical Character and Ligand Properties," discusses a complex bonding scenario found in a biradicaloid chromium complex. The article uses a metaphor of doors and a staircase to illustrate the bonding interactions between the ligand and the metal. The electrons flow in both directions, from the ligand to the metal and vice versa. The article provides more information on this topic and is authored by Peter Coburger, David Zuber, Clara Schweinzer, and Moritz Scharnhölz. [Extracted from the article]

Invited for the cover of this issue is the group of Peter Coburger at the Technical University of Munich. The image, painted by Dr. Christoph Selg, depicts the bonding relationships in a biradicaloid chromium complex as a staircase, with the people symbolizing the two‐way flow of electrons between the ligand and the metal. Read the full text of the article at 10.1002/chem.202302970. [ABSTRACT FROM AUTHOR]