New Complexes of Antimony(III) with Tridentate ,,-Ligands (E = O, S, Se, Te, NH, NMe) Derived from -Methyldiethanolamine.

We synthesized a series of new antimony(III) compounds by reaction of Sb(OEt) with organic ligands of the type E(CH-CH-OH), with E = NH, NMe, O, S, Se, and Te. The synthesized compounds have the general composition [E(CH-CH-O)]Sb(OEt). For comparison, the compound (O-CH-CH-S)Sb(OEt) was prepared.

9-(Pyrrolidinium-1-yl)-9-boranuidabi-cyclo-[3.3.1]nona-ne.

The title compound, CHBN, is an adduct formed from 9-borabi-cyclo-[3.3.1]nonane (9-BBN) and pyrrolidine.

Two polymorphs of ,'-diphenyl-2-[1-(propyl-amino)-ethyl-idene]propanedi-amide.

Two polymorphs of the title compound, CHNO, have been isolated. Polymorph () crystallizes in the monoclinic space group / and polymorph () in the tetra-gonal space group /. The main difference between the two polymorphs on the mol-ecular level is the orientation of the -propyl group.

()--Phenyl--(phenyl-carbamo-yl)-3-[prop-yl(tri-methyl-sil-yl)amino]-acryl-amide chloro-form hemisolvate.

The title compound, CHNOSi·0.5CHCl, crystallizes in the the triclinic space group with two host mol-ecules and one chloro-form mol-ecule in the asymmetric unit. The core of the mol-ecule consists of a urea unit bound to a 3-amino-acryloyl group.

CO Capture with Silylated Ethanolamines and Piperazines.

Amine treatment is commonly used to capture CO from exhaust gases and from ambient air. The Si-N bond in aminosilanes is capable of reacting with CO more readily than amines. In the current study we have synthesized trimethylsilylated ethanolamines, diethanolamines and piperazines and investigated their reaction toward CO.

CO Capture with Silylated Ethanolamines and Piperazines.

Invited for this month's cover is the group of Marcus Herbig from the TU Bergakademie in Freiberg. The cover picture shows the reaction of CO with a silyl derivative of the biogenic amine ethanolamine. The role of CO as a contributor to climate change makes "carbon capture" a desirable goal.