During the COVID-19 pandemic, the structural biology community swung into action quickly and efficiently, and many urgent questions were solved by macromolecular structure determination. The Coronavirus Structural Task Force evaluated all structures from SARS-CoV-1 and SARS-CoV-2, but errors in measurement, data processing and modelling are present beyond these structures and throughout the structures deposited in the Protein Data Bank. Identifying them is only the first step; in order to minimize the impact that errors have in structural biology, error culture needs to change. It should be emphasized that the atomic model which is published is an interpretation of the measurement. Furthermore, risks should be minimized by addressing issues early and by investigating the source of a given problem, so that it may be avoided in the future. If we as a community can do this, it will greatly benefit experimental structural biologists as well as downstream users who are using structural models to deduce new biological and medical answers in the future.

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Die Hydrolyse von (CO)5Cr · PCl3 in Gegenwart von Triethylamin liefert Et3NH[(CO)5Cr · P(OH)2O], das durch Kationenaustausch in die freie Säure überführt und als kristallines Hydrat (CO)5Cr · P(OH)3 · H2O isoliert werden kann. Somit ist phosphorige Säure am Komplex als Tris(hydroxy)phosphan‐Tautomeres stabilisierbar. (CO)5Cr · P(OH)3 ist eine schwächere Säure als OP(OH)3; sie reduziert Ag+ zum Metall.

Abstract The thermal decomposition of (CO)5MP(NH2)3 (M = Cr, Mo, W) has been studied. No definite products were obtained for M = W but the molybdenum complex yielded [(CO)5MoP]4(NH)6. The same type of complex results with M = Cr, in addition to [(CO)5CrP(NH)NH2]3. The pentacarbonylchromium groups may be removed from the adamantane type [(CO)5CrP]4(NH)6 with sulfur. The new compound S4P4(NH)6 results in this reaction. This compound is also a by-product in the thermal decomposition of SP(NH2)3. Attempts to prepare P4(NH)6 by desulfurisation from S4P4(NH)6 or from the chromium complex failed.

Abstract The solvolysis of (CO)5CrPCl3 with N2H4 or H2N-N(CH3)2 yields (CO)5CrP(NH-NH2)3 and (CO)5CrP[NH-N(CH3)2]3 respectively containing the hitherto unknown and unstable ligands P(NH-NH2)3 and P[NH-N(CH3)2]3. Their constitution is derived from spectroscopic data.