German catalysis meeting - 50 years and as young as ever

50 Years Young: The 50th annual meeting of the German Catalysis Society (GeCatS), hosted by DECHEMA, was recently held in Weimar. The long-standing history of this conference reflects a good tradition for chemists and chemical engineers from Germany and other countries to come together and discuss about the current progress in catalysis in academia and industry

Bis[μ-N,N′-bis(2,6-diisopropylphenyl)ethene-1,2-diamido]-1,4(η2);1:2κ4 N:N;3:4κ4 N:N-bis(diethyl ether)-1κO,4κO-di-μ-hydrido-2:3κ4 H:H-2,3-dichromium(II)-1,4-dilithium(I) pentane hemisolvate

The title compound, [Cr2Li2(C26H36N2)2(μ-H)2(C4H10O)2]·0.5C5H12, is a binuclear chromium complex bridged by two hydrogen atoms. Each chromium atom is coordinated in a distorted square-planar geometry by one chelating bis­(2,6-diisopropyl­phen­yl)ethene-1,2-diamido ligand via its two N atoms. Additionally, two diametrically opposed lithium ether adducts coordinate in an η4 mode on the backbone of the ligands. There is a crystallographic inversion center in the middle of the Cr2H2 ring. One of the isopropyl groups is disordered over two positions in a 0.567 (7):0.433 (7) ratio. Disorder is also observed in the pentane hemisolvate molecule

Metallorganische Untersuchungen zur katalytischen Selektivoligomerisierung von Ethylen mit Chromkomplexen

Die Arbeit beschreibt die Entwicklung eines neuen Mechanismus zur selektiven Tetramerisierung von Ethen zu 1-Octen sowie die Untersuchung eines neuen Trimerisierungssystems von Ethen zu 1-Hexen. Es besteht aus einem Chromsalz, einem Phosphanamin als Liganden und Triethylaluminium in Toluol. Ligand-Al-Komplexe weisen darauf hin, dass die deprotonierte Form des Liganden Bestandteil der aktiven Spezies ist. Bei höheren Temperaturen erfolgt eine Deaktivierung des katalytischen Systems durch Umlagerung des Liganden. Cr-Al-Ligand-Komplexe deuten auf die Art der aktiven Spezies in der Katalyse hin

(Isopropyl­amino)(meth­yl)diphenyl­phospho­nium iodide

The title compound, C16H21NP+·I−, was obtained by the reaction of Ph2PN(iPr)P(Ph)N(iPr)H with MeI involving cleavage of one of the P—N bonds in diethyl ether. The two phenyl rings form a dihedral angle of 82.98 (5)°. A weak donor–acceptor N—H⋯I inter­action is observed

Bis[N,N′-bis­(2,6-diisopropyl­phen­yl)ethane-1,2-diimine]-1κ2 N,N′;2κ2 N,N′-tri-μ-trichlorido-1:2κ6 Cl:Cl-chlorido-1κCl-tetra­hydro­furan-2κO-dichromium(II) dichloro­methane 4.5-solvate

In the mol­ecular structure of the title compound, [Cr2Cl4(C26H36N2)2(C4H8O)]·4.5CH2Cl2, the two CrII centers are bridged by three Cl atoms, forming a dinuclear complex. Each CrII center is coordinated by one chelating bis­(2,6-diisopropyl­phen­yl)ethane-1,2-diimine ligand via both N atoms. An additional chloride ion binds to one chromium center, whereas an additional tetra­hydro­furan mol­ecule coordinates to the second CrII center. The coordination geometry at each CrII center can be best described as distorted octa­hedral

[Bis(diphenyl­phosphan­yl)dimethyl­silane-κ2 P,P′]tetra­carbonyl­chromium(0)

The title compound, [Cr(C26H26P2Si)(CO)4], was obtained by the reaction of Ph2PSiMe2PPh2 with Cr(CO)6 in refluxing toluene by ligand exchange. The CrC4P2 coordination geometry at the Cr atom is distorted octa­hedral, with a P—Cr—P bite angle of 80.27 (1)°

[2,2-Bis(diphenyl­phosphan­yl)propane-κ2 P,P′]tetra­carbonyl­chromium(0) dichloro­methane monosolvate

The title compound, [Cr(C27H26P2)(CO)4]·CH2Cl2, was obtained by the reaction of Ph2PCMe2PPh2 with Cr(CO)6 in refluxing toluene by substitution of two carbonyl ligands. The CrC4P2 coordination geometry at the Cr atom is distorted octa­hedral, with a P—Cr—P bite angle of 70.27 (2)°

Diacetonitrile[N,N′-bis(2,6-diisopropyl­phenyl)ethane-1,2-diimine]dichloridochromium(II) acetonitrile solvate

The title compound, [CrCl2(CH3CN)2(C26H36N2)]·CH3CN, was synthesized by the reaction of CrCl2(THF)2 with N,N′-bis­(2,6-diisopropyl­phen­yl)ethane-1,2-diimine in dichloro­methane/acetonitrile. The chromium center is coordinated by two N atoms of the chelating diimine ligand, two chloride ions in a trans configuration with respect to each other, and by two N atoms of two acetonitrile mol­ecules in a distorted octa­hedral geometry

Mental health of the adult population in Germany during the COVID-19 pandemic. Rapid Review

This rapid review examines how the mental health of adults in the general population in Germany changed during the COVID-19 pandemic. We conducted a systematic literature search and included 68 publications as of July 30 2021. The underlying studies were classified according to their suitability for representative statements for the general population and for estimating changes in mental health over time. In addition, the observation period and operationalisation of outcomes were considered. The first wave of infection and the summer plateau were mapped by 65% of the studies. Studies that were particularly suitable for representative statements due to their research design showed mixed results, which tend to indicate a largely resilient adult population with a proportion of vulnerable individuals. A predominantly negative development of mental health was described by results from more bias-prone study designs. Routine data analyses showed decreases in outpatient and especially inpatient care, increased use of a crisis service, mixed results for outpatient diagnoses, incapacity to work and mortality as well as indications of shifts in the spectrum of diagnoses. As the current evidence is ambiguous, generalised statements should be reflected in favour of a differentiated view. There is a need for research on the further course of the pandemic, specific risk groups and the prevalence of mental disorders