Kopplung von Cyclosilazanen mit Aminofluorboranen und Borazinen

Jaschke, Bettina; Helmold, Nina; Müller, Ilse; Pape, Thomas; Noltemeyer, Mathias; Herbst‐Irmer, Regine; Klingebiel, Uwe

doi:10.1002/1521-3749(200209)628:9/10<2071::aid-zaac2071>3.0.co;2-k

Cited by 28 publications

(2 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[Symmetry code: (*) Àx, y, 3 2 À z.] asymmetrically substituted borazines have been characterized to date by single-crystal X-ray analyses (Jaschke et al, 2002;No È th & Habereder, 2001;Srivastova et al, 1998;Welker et al, 1989). One such example is compound (IV) (Jaschke et al, 2002), in which ®ve of the B 3 N 3 ring substituents are identical to those in (III (14) A Ê ], due to the F substituents that reside on these B atoms and the resulting %interaction.…”

Section: Figurementioning

confidence: 99%

“…asymmetrically substituted borazines have been characterized to date by single-crystal X-ray analyses (Jaschke et al, 2002;No È th & Habereder, 2001;Srivastova et al, 1998;Welker et al, 1989). One such example is compound (IV) (Jaschke et al, 2002), in which ®ve of the B 3 N 3 ring substituents are identical to those in (III (14) A Ê ], due to the F substituents that reside on these B atoms and the resulting %interaction. This variability in bond lengths within the B 3 N 3 ring is also observed in (IV) [1.408 (3)±1.491 (3) A Ê ], on account of the F substituents on two of the three B atoms and the boat conformation, which lengthens the B1ÐN4 and B1Ð N6 [average 1.488 (3) A Ê ], and B3ÐN5 and B2ÐN5 [average 1.441 (3) A Ê ] distances.…”

Section: Figurementioning

confidence: 99%

See 1 more Smart Citation

An asymmetrically substituted borazine

2004

View full text Add to dashboard Cite

The B3N3 ring in the title compound, 1,3,5‐tri‐tert‐butyl‐2,4‐difluoro‐6‐phenylcyclotriborazane, [PhF2B3N3tBu3] or C18H32B3F2N3, an asymmetrically substituted borazine, is distorted from planarity. The molecule resides on a twofold axis. The N atoms of the N—B(Ph)—N group lie on opposite sides of the least‐squares plane formed by the four remaining ring atoms, due to steric accommodation of the tert‐butyl groups, a conformation not previously observed for a borazine. The B—N bond lengths are in the range 1.4283 (14)–1.4493 (12) Å, due to the F substituents residing on two of the B atoms, which also produce a large deviation from 120° in one of the B—N—B angles [ca 113.6 (1)°]. The phenyl group is twisted with respect to the B3N3 ring, the interplanar angle being 62.87 (5)°.

show abstract

Section: Figurementioning

confidence: 99%

Section: Figurementioning

confidence: 99%

An asymmetrically substituted borazine

2004

View full text Add to dashboard Cite

show abstract

Synthesis and Characterization of Novel Titanium, Germanium, and Tin Silazane Complexes Bearing a Cyclohexasilazanetriido Ligand

et al. 2007

View full text Add to dashboard Cite

Novel heterometallic silazane complexes were synthesized by the reaction of 1‐lithio‐2,2,4,4,6,6‐hexamethylcyclotrisilazane Li(HMCTS)H2 with the tetrachloride salts of titanium and germanium as well as by the reaction of 1,1,3,3,5,5‐hexamethylcyclotrisilazane H3(HMCTS) with tin tetrachloride and excess triethylamine. The products [H3(DMCHS)TiCl] (1), [H3(DMCHS)GeCl] (2), and [H3(DMCHS)SnCl] (3) {H3(DMCHS) = 2,2,4,4,6,6,8,8,10,10,12,12‐dodecamethylcyclohexasilazane‐1,5,9‐triido} were characterized by 1H‐, 13C‐, 14N‐, and 29Si NMR spectroscopy, elemental analyses and single‐crystal X‐ray structure analyses. The complexes have a surprising and interesting structure, that of a new dodecamethylcyclohexasilazane system with the Ti, Ge, or Sn atom in the center. These metal atoms are coordinated by one chlorine atom and three nitrogen atoms. The metal centers are part of three six‐membered hetero‐silazane rings. (© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)

show abstract

Experimental Charge Density Studies of Cyclotetrasilazane and Metal Complexes Containing the Di‐ and Tetraanion

Kocher

Selinka

Leusser

et al. 2004

Zeitschrift anorg allge chemie

View full text Add to dashboard Cite

The homologous series of parent octamethylcyclotetrasilazane (c‐NH‐SiMe2‐)4, (1), the lithium complex [(THF)2Li2(c‐N‐SiMe2‐NH‐SiMe2‐)2]2, (2), containing the cyclic dianion, and [(THF)2LiAl(c‐N‐SiMe2‐)4]2, (3), accommodating the unprecedented tetraanion [Me2SiN]4‐ was synthesized to investigate the nature of the covalent Si‐N single bond in the presence of various metals. These model compounds show a wide diversity of Si‐N(H), Si‐N(M), Si‐N(H, M) and M‐N bonds and serve as bench‐mark systems to study polar bonds by high‐resolution low‐temperature X‐ray structure analysis. Experimental charge density studies reveal highly polar Si‐N bonds with remarkable ionic contribution, even in the non‐metallated starting material 1. The Li‐N and Li‐O bonds have to be classified as almost purely ionic bonds with topological properties not far from those determined for NaCl.

show abstract

Kopplung von Cyclosilazanen mit Aminofluorboranen und Borazinen

Cited by 28 publications

References 19 publications

An asymmetrically substituted borazine

An asymmetrically substituted borazine

Synthesis and Characterization of Novel Titanium, Germanium, and Tin Silazane Complexes Bearing a Cyclohexasilazanetriido Ligand

Experimental Charge Density Studies of Cyclotetrasilazane and Metal Complexes Containing the Di‐ and Tetraanion

Contact Info

Product

Resources

About