The Polymerization of NiBr2(P(CH2CH2CN)3)2: A 'Triply-Specific' Solid-State Reaction.
Abstract
The solid-state reaction of square-planar NiBr2(P(CH2CH2CN)3)2 has been shown to lead to highly oriented crystals of octahedral polymer. Reaction of the monomer in the solid-state at -5 leads to product which is characterized by (a) freedom from the usual contaminants arising from reaction in solution; (b) stereospecificity, leading to formation of strictly linear polymer; and (c) topotaxy, in which (a* reactant' a*product), (b* reactant' b*product) are aligned for the orthorhombic reactant and monoclinic product phases; further, no twinning is observable in the product. There is a negligible volume change involved in the polymerization approximately 0.3%). Individual single crystals react at -5 with a well-defined front passing across the crystal, virtually parallel to a (100) face. This is consistent with the observation that only the a axis of the reactant crystal must reorient to form the product pseudomorph. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1977
- Accession Number
- ADA039687
Entities
People
- Bruce M. Foxman
- Kent Cheng
Organizations
- Brandeis University