Abstract. We review the application of non-relativistic constituent quark models to study one, two and three non-strange baryon systems. We present results for the baryon spectra, potentials and observables of the NN, N∆, ∆∆ and NN * (1440) systems, and also for the binding energies of three non-strange baryon systems. We make emphasis on observable effects related to quark antisymmetry and its interplay with quark dynamics.

The direct reaction of [NPCl2] n with the difunctional reagent 2,2‘-dihydroxybiphenyl (HOC6H4C6H4OH) and K2CO3 in tetrahydrofuran gave soluble linear phosphazene high polymers instead of the expected cross-linked products. The reaction of [N3P3Cl6] with 1, 2, or 3 equiv of HOC6H4C6H4OH and K2CO3 in acetone gave the known spiro derivatives [N3P3Cl4(O2C12H8)], [N3P3Cl2(O2C12H8)2], and [N3P3(O2C12H8)3] without formation of bridging products, and the dichloro derivative reacted directly with para-substituted phenols HOC6H4R and K2CO3 in acetone to give the new compounds [N3P3(OC6H4R)2(O2C12H8)2] (R = Br, COC6H5, or OCH3), without signs of replacement of the bis(aryloxy) substituents. In an analogous manner, poly(dichlorophosphazene) [NPCl2] n reacted with HOC6H4C6H4OH and K2CO3 in THF without significant cross-linking to give, depending on the mole ratio, the soluble polymer [NP(O2C12H8)] n (M w = 450 000, T g = 160 °C) or the partially substituted polymers {[NP(O2C12H8)]0.35[NPCl2]0.65} n . The latter were subsequently reacted with the para-substituted phenols HOC6H4R and K2CO3 in THF to give the random copolymers {[NP(O2C12H8)]0.35[NP(OC6H4R)2]0.65} n [R = Br, CN, COCH3, or COC6H5). The new polymers are soluble (except the CN derivative, which was sparingly soluble) white solids, with only a few ppm of unreacted chlorine, and Mw of the order of 1 000 000 with polydispersities varying from 3 to 10. The T g values varied with R ranging from 73 °C (R = CN) to 54 °C (R = COMe).

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