Spectra, magnetic dipole moments and spectroscopic factors of a number of A = 205-209 nuclei as well as M1 transitions in 2~ are investigated in terms of large-scale shellmodel calculations which include lp-1 h excitations and for some nuclei 2p-2 h excitations. The calculated spectra agree well with the data. The calculated g-factors are in fair agreement with the data in most cases. The predicted strength for M1 transitions to low-lying states in 2~ is less than that obtained from previous calculations. Spectroscopic factors for l= 0 proton pick-up from 2~ and 2~ agree very well with recent experimental data from (e, e' p) reactions.