  Based on the Majumdar-Ghosh chain we construct several spin models which
allow us to investigate spinon dynamics in the regime close to deconfinement of
spinons. We consider the J_1 - J_2 - \delta model, two coupled J_1 - J_2 chains
(ladder), and a 2D array of coupled J_1 - J_2 chains. Using the picture of two
spinons interacting with a string confining potential we calculate the singlet-
triplet splitting, magnetic structure factor, tunneling amplitude of two
spinons and the excitation spectra for the ladder and the array.
