Spin crossover in phosphorus- and arsenic-bridged cyclopentadienyl-manganese(II) dimers.
Manganocene reacts with LiE(SiMe(3))(2) (E = P or As) to give [(η(5)-Cp)Mn{μ-E(SiMe(3))(2)}](2), where E = P (1) or As (2). The temperature dependence of the magnetic susceptibility in 1 and 2 is due to antiferromagnetic exchange and to spin-crossover (SCO). Compound 2 shows two-step SCO with hysteresis, involving high-spin (S = 5/2) and intermediate-spin S = (3/2) Mn(II).
Institut für Anorganische Chemie, Universität Regensburg, 93040 Regensburg, Germany.
Sabine
S
Scheuermayer
Floriana
F
Tuna
Michael
M
Bodensteiner
Manfred
M
Scheer
Richard A
RA
Layfield