86067-30-3Relevant articles and documents
Mixed sandwich imido complexes of Uranium(V) and Uranium(IV): Synthesis, structure and redox behaviour
Tsoureas, Nikolaos,Cloke, F. Geoffrey N.
, p. 25 - 33 (2018)
The mixed sandwich U(III) complex {U[η8-C8H6(1,4-Si(iPr)3)2](Cp*)(THF)} reacts with the organic azides RN3 (R = SiMe3, 1-Ad, BMes2) to afford the corresponding, structurally characterised U(V) imido complexes {U[η8-C8H6(1,4-Si(iPr)3)2](Cp*)(NR)}. In the case of R = SiMe3, the reducing power of the U(III) complex leads to reductive coupling as a parallel minor reaction pathway, forming R-R and the U(IV) azide-bridged complex{[U]}2(μ-N3)2, along with the expected [U] = NR complex. All three [U] = NR complexes show a quasi-reversible one electron reduction between ?1.6 and ?1.75 V, and for R = SiMe3, chemical reduction using K/Hg affords the anionic U(IV) complex K+{U[η8-C8H6(1,4-Si(iPr)3)2](Cp*) = NSiMe3}-. The molecular structure of the latter shows an extended structure in the solid state in which the K counter cations are successively sandwiched between the Cp* ligand of one [U] anion and the COTtips2 ligand of the next.
Boron Imides from the Thermal Decomposition of Diarylazidoboranes
Paetzold, Peter,Truppat, Ruediger
, p. 1531 - 1539 (2007/10/02)
Diarylazidoboranes Ar2BN3 (1a-d) are thermolyzed either into diazadiboretidines (ArBNAr)2 (2) or into borazines (ArBNAr)3 (3).After formation of only one half of the expected amount of N2, the boryltetrazaborolines 4c, d are isolated as intermediates.The boranes 1a-d are transformed into phenyltetrazaborolines 6a-d or into silyltetrazaborolines 7a-d by the action of phenyl or trimethylsilyl azide, respectively; the formation of 7b, d is accompanied by the formation of the open-chain aminoboranes 9b, d.The action of triethylborane on 1a-d yields the diborylamines 5a-d and, moreover, the diborylamines 8a, d, isomeric to 5a, d.The formation of boron imides ArB=NAr (10a-d) as reaction intermediates is discussed and, in favour of that, the reactions of 1c with O-N(Me)=CH-Ph, yielding 11c, and of 1a, d with B(sBu)3, yielding 5a', 8a', 5d', are referred too.
