Rhodium Nanoflowers Stabilized by a Nitrogen-Rich PEG-Tagged Substrate as Recyclable Catalyst for the Stereoselective Hydrosilylation of Internal Alkynes was written by Guo, Wusheng;Pleixats, Roser;Shafir, Alexandr;Parella, Teodor. And the article was included in Advanced Synthesis & Catalysis in 2015.SDS of cas: 16356-02-8 This article mentions the following:
Morphol. and size controllable Rh nanoparticles stabilized by a N-rich polyoxyethylenated derivative were prepared by reduction of RhCl3 with NaBH4 in H2O at room temperature and fully characterized. The flower-like Rh NPs are effective and recyclable catalysts for the stereoselective hydrosilylation of challenging internal alkynes and diynes, affording the (E)-vinylsilanes in quant. yields for a wide range of substrates. The insolubility of the nanocatalyst in Et2O allows its easy separation and recycling. In the experiment, the researchers used many compounds, for example, 1,4-Dimethoxy-2-butyne (cas: 16356-02-8SDS of cas: 16356-02-8).
1,4-Dimethoxy-2-butyne (cas: 16356-02-8) belongs to ethers. Ethers are good solvents partly because they are not very reactive. Most ethers can be cleaved, however, by hydrobromic acid (HBr) to give alkyl bromides or by hydroiodic acid (HI) to give alkyl iodides. The unique properties of ethers (i.e., that they are strongly polar, with nonbonding electron pairs but no hydroxyl group) enhance the formation and use of many reagents. For example, Grignard reagents cannot form unless an ether is present to share its lone pair of electrons with the magnesium atom. Complexation of the magnesium atom stabilizes the Grignard reagent and helps to keep it in solution.SDS of cas: 16356-02-8
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem