1. Unsymmetrical three-dimensional macromolecules: preparation and characterization of strongly dipolar dendritic macromolecules
2. Dendrimer Surface Chemistry. Facile Route to Polyphosphines and Their Gold Complexes
3. Crystallographic data forG1: C24H24O3N6PS,M= 909.33, rhombohedric, space groupR3,a=b= 16.746 (3) Å,c= 11.910 (2) Å,V= 2892.7 Å,Z= 1, ρcalcd= 1.57 g·cm-3,μ = 8.56 cm-1, crystal size (mn) 0.60 × 0.30 × 0.07 mm, 7718 measured reflections (1980 independent),Rm= 0.043,Rm= 0.0326, andRw= 0.0339 from 1278 reflections used with a criterion [I> 3σ(I)]. The data collection was performed at room temperature (T= 293 K) on a IPDS STOE using graphite-monochromatized Mo Kα radiation. The structure was solved by direct methods using SIR929and subsequent difference Fourier maps. The refinement of the model was performed by using the full-matrix least-squares techniques with the aid of the package CRISTALS.10All hydrogen atoms were found on difference Fourier maps, but they were introduced in the process of refinement as fixed contributors with (C−H = 0.96 Å) and isotropic thermal parameters fixed 20% higher than those of the carbon atoms to which they were attached; their positions were recalculated after each cycle of refinement. All non-hydrogen atoms were anisotropically refined. Further details of the crystal structure investigation are available on request from the Director of the Cambridge Crystallographic Data Centre, 12 Union Rd, GB-Cambridge CB21EZ, U.K. on quoting the full journal citation.