Activation of P4 by Li[SitBu3]. Generation of lithium bis(supersilyl)heptaphosphanortricyclanide Li[P7(SitBu4)2]
- 1. Frankfurt Univ., Frankfurt am Main (Germany). Inst. fuer Anorganische Chemie
Description
Treatment of P4 with one equivalent of Li[SitBu3] leads to the formation of a number of oligo-phosphanes and -phosphides, e.g. the bicyclo[1.1.0]tetraphosphane P4(SitBu3)2, the heptaphosphanortricyclane P7(SitBu3)3, the tetraphosphides Li3[P(PSitBu3)3] (Li3[2a]), and the pentaphosphacyclopentadienide Li[P5]. From this reaction we could isolate single crystals of Li3[2a]. However, this reaction took another course in the presence of Li[OSitBu3]. When P4 was treated with one equivalent of Li[SitBu3] in the presence of Li[OSitBu3], the heptaphosphanortricyclanide Li[P7(SitBu3)2] (Li[8a]) was formed. Single crystals of the cluster {Li4(C6H6)(OSitBu3)[8a]3}.C6H6 (orthorhombic, space group Pca21) were isolated from the reaction mixture at ambient temperature. This cluster compound consists of three chiral Li[P7(SitBu3)2] units, one silanolate Li[OSitBu3], and one benzene molecule. We further investigated the degradation reaction of the bicyclo[1.1.0]tetraphosphane P4(SitBu3)2. After heating a benzene solution to 60 C for 24 h, we found 100 % conversion of P4(SitBu3)2, and P7(SitBu3)3 (monoclinic, space group P21/c) and tBu3SiPH2 were formed.
Additional details
Publishing Information
- Journal Title
- Zeitschrift fuer Naturforschung. B: Chemical Sciences
- Journal Volume
- 71
- Journal Issue
- 2
- Journal Page Range
- p. 135-139
- ISSN
- 0932-0776
- CODEN
- ZNBSEN
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 47053449
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CRYSTAL STRUCTURE; LITHIUM COMPLEXES; MOLECULAR STRUCTURE; MONOCRYSTALS; PHOSPHORUS COMPOUNDS; X-RAY DIFFRACTION
- Descriptors DEC
- ALKALI METAL COMPLEXES; COHERENT SCATTERING; COMPLEXES; CRYSTALS; DIFFRACTION; SCATTERING