Darstellung, Struktur und Stereoisomerie von 1,3‐Di‐tert‐butyl‐1,3,2,4‐diazadistibetidinen

Abstract

Synthesis, Structure, and Stereoisomerism of 1,3-Di-tert-butyl-l,3.2,4-diazadistibetidines Starting from 1,3-di-tert-butyl-2,4-dichloro-l,3,2,4-diazadistibetidine a series of 1,3,2,4-diazadistibetidines [R -SbN -tBuI2 with R = OMe (2), OPh (3), OtBu (4), N(Tms)2 (5), P(Tms), (6), Me (7), and tBu (8) has been synthesized. The NMR spectra prove most of the reaction products to be mixtures of geometrical isomers. The structure of trans-tetra-tert-butyldiazadistibetidine 8a was confirmed by X-ray structure deterrnination.Zur Frage der geometrischen Isomerie bei substituierten Diazadiphosphetidinen wurden in den letzten Jahren zahlreiche Untersuchungen durchgefuhrt '

Dimeric antimony complexes capturing dimethylamine as a neutral donor; syntheses and structural characterisation of [SbCl2(NHMe2)(µ-OEt)]2and [SbCl(NHMe2)(µ-NBut)]2

“…The dimeric unit lies on a crystallographic centre of symmetry. Unlike 1, where the Sb-0 bond lengths alternate, the Sb-N bond lengths of the core in 2 are almost identical [2.018(3) and 2.028(3) A], with associated angles within the dimeric core of Sb-N-Sb 101.62 (13) and N-Sb-N 78.38( 13)". The tert-butylamine precursor has undergone dimetallation producing two equivalents of NHMe, in the process.…”

Chemistry of pnictogen(iii)–nitrogen ring systems

“…The tertbutyl derivative [ t BuSb(m-N t Bu)] 2 is also obtained as the trans isomer in the solid state. 42 To date, only two structural studies have been reported for bismuth derivatives. Both [DippN(H)Bi(m-NDipp)] 2 26 and…”

Synthesis of a Molecule with Five Different Adjacent Pnictogens

“…Besides some halide substituted compounds like [X‐Sb( μ ‐NR)] 2 (X=halide; R=Mes*, t Bu), there are also some further functionalized ones like [R 1 Sb( μ ‐NR 2 )] 2 (R 1 = t Bu; R 2 =N 3 , OPh, O t Bu, OMe, t Bu, Me, PSiMe 3 . R 1 =NH t Bu, NHDipp, NHDmp; R 2 = t Bu (Dmp=2.6‐dimethyl‐phenyl)) . Diazadibismetidines like [Bi 2 (N t Bu) 4 Li 2 ], [PhBi( μ ‐N t Bu)] 2 or [DippNHBi( μ ‐NDipp)] 2 are known as well but only a little work has been done in this field up to now .…”