Pd(III) Mott–Hubbard Compounds - Material Designs and New Physical Properties in MX-and MMX-Chain Compounds - page 50

Fig. 4.17 CDW coherence as a function of x . The filled circle and triangle represent CDW
coherence along the chain and c axis, respectively, determined by using STM. The open circle and
triangle represent those determined by using X-ray diffuse scattering measurements. The solid
lines are guides for the eyes

Fig. 4.18 dð M M Þ along the 1D chain as a function of (a) x in [Ni 1 x Pd x (chxn) 2 Br]Br 2 at room
temperature, (b) temperature of [Pd(en) 2 Br](C 5 -Y) 2 H 2 O, and (c) n in [Pd(en) 2 Br](C n -Y) 2 H 2 Oat
room temperature

4.4 Comparison of Metal-to-Metal Distance in Both Systems

Finally, we compared the metal-to-metal distance dð M M Þ in the two systems,

([Pd(en) 2 Br](C n -Y) 2 H 2 O and [Ni 1 x Pd x (chxn) 2 Br]Br 2 ). Figure 4.18 shows the x

dependence of dð M M Þ along the 1D chain in [Ni 1 x Pd x (chxn) 2 Br]Br 2 , temper-

ature dependence of dð M M Þ in [Pd(en) 2 Br](C 5 -Y) 2 H 2 O, and n dependence of

dð M M Þ in [Pd(en) 2 Br](C n -Y) 2 H 2 O at room temperature. In all cases, the

M distance of ca. 5.26 ˚ , namely, CDW and
MH states are the ground state when dð

electronic state changed at an M

is longer and shorter than 5.26 ˚ ,

Pd Pd Þ