Table 1.

General structure of the [LnCp₃] complexes and magnetic data at room temperature (295–300 K) for selected compounds.

Ln	Electronic configuration of metal ion	Ground state of metal ion	Exptl. μ eff [a]	Calcd. μ eff [b]
CeIII	4f1	2F5/2	2.46	2.54
EuIII	4f6	7F0	3.74[c] 3.66[d]	3.40–3.61[e]
YbIII	4f13	2F7/2	4.00	4.54
LuIII	4f14	1S0	diamagnetic

[a] Values from Ref. [67], unless otherwise stated. [b] Theoretical values in the free‐ion approximation. [c] Value from Ref. [71]. [d] Value for the mono‐THF adduct, calculated with the data from Ref. [72]. [e] Non‐magnetic ground state but presence of thermally populated magnetic excited states, ^[73] estimated values at room temperature from Ref. [74].