4151-77-3Relevant articles and documents
Structural identification of the factors that prevent an electronic spin-state crossover in Fe[(C6H5)B(3-Mepz)3]2 (pz = pyrazolyl ring)
Reger, Daniel L.,Elgin, J. Derek,Smith, Mark D.,Grandjean, Fernande,Rebbouh, Leila,Long, Gary J.
, p. 2616 - 2622 (2006)
The synthesis, structural, magnetic, and M?ssbauer spectral properties of Fe[(C6H5)B(3-Mepz)3]2 (2, pz = pyrazolyl ring) are reported. The single crystal X-ray structural results indicate that at both 294 and 90 K Fe[(C6H5)B(3-Mepz)3]2 (2) has a distorted octahedral iron(II) coordination environment with Fe-N bond distances that average ca. 2.18 ?, distances that clearly indicate the high-spin nature of the complex at these temperatures. Both the magnetic and M?ssbauer spectral results indicate that Fe[(C6H5)B(3-Mepz)3]2 (2) remains high-spin down to 4 K. This result is surprising because the closely related Fe[(p-R-C6H4)B(3-Mepz)3]2 [R = I, {single bond}C{triple bond, long}C{single bond}H, {single bond}C{triple bond, long}C{single bond}SiMe3, or {single bond}C{triple bond, long}C{single bond}C6H5] complexes do exhibit electronic spin-state changes on cooling. The absence of a spin-state crossover in Fe[(C6H5)B(3-Mepz)3]2 (2) is the result of its molecular structure in which the three pyrazolyl rings of each tridentate ligand are highly twisted away from an ideal C3v coordination symmetry, a twisting distortion that favors the high-spin form of the complex with longer Fe-N bond distances.
Functionalization of Bis-Diazaphospholene P–P Bonds with Diverse Electrophiles
Huchenski, Blake S. N.,Robertson, Katherine N.,Speed, Alexander W. H.
supporting information, p. 5140 - 5144 (2020/07/27)
Phosphorus-sp3 or -sp2 carbon bonds are readily formed by the reaction of bis-diazaphospholenes with several classes of electrophiles. These reactions result in cleavage of the phosphorus–phosphorus bond and formation of functionalized diazaphospholenes. The reactions proceed rapidly, without catalysis. Experimental evidence with aryl and alkyl halides suggests the intermediacy of radicals in some cases, however other evidence suggests either radical or polar mechanisms may be operative for certain substrates, with a dependence on reaction conditions. In three cases, the product aryl diazaphospholenes have been shown to transfer the aryl substituent to electrophiles. These results reveal that diazaphospholene dimers are potent participants in radical chemistry with organic substrates at room temperature without requiring chemical initiators.
Structural and spectroscopic analysis of a new family of monomeric diphosphinoboranes
Ordyszewska, Anna,Szynkiewicz, Natalia,Perzanowski, Emil,Chojnacki, Jaros?aw,Wi?niewska, Aleksandra,Grubba, Rafa?
, p. 12482 - 12495 (2019/08/26)
We present a series of amino- and aryl(diphosphino)boranes R2PB(R′′)PR′2, where R2P, R′2P = tBu2P, tBuPhP, Ph2P, Cy2P, and R′′ = iPr2N, Ph, which were obtained via the
Compounds for organic electroluminescent devices
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Page/Page column 39, (2018/08/12)
The present invention relates to boron compounds for use in electronic devices, especially organic electroluminescent devices, and to a process for preparing these compounds and to electronic devices, especially organic electroluminescent devices, comprising these compounds.
