Synthesis, Structure, and Magnetic Properties of [MnIII(salpn)NCS]n, a Helical Polymer, and the Dimer [MnIII(salpn)NCS]2. Weak Ferromagnetism in [MnIII(salpn)NCS]n Related to the Strong Magnetic Anisotropy in Jahn−Teller Mn(III) (salpnH2 = N,N‘-Bis(salicylidene)-1,3-diaminopropane) | Publicación