Table 3.

Hydroformylation of various substrates using catalyst Rh1@Fe₄(Zn‐L)₆ at various temperatures in acetonitrile.^[a]

Entry	Catalyst	Substrate	T [°C]	Conv. [%]	l/b[b]
1[c]	Rh1@Fe4(Zn‐L)6	1‐Octene	70	0	–
2[d]	C60@Fe3(Zn‐L)4	1‐Octene	60	85	2.7
3[e]	Rh1@Fe4(Zn‐L)6	1‐Octene	70	78	2.4
4[f]	Rh1/Rh2	1‐Octene	70	58	2.0
5[e]	Rh1@Fe4(Zn‐L)6	Styrene	70	0	–
6[f]	Rh1/Rh2	Styrene	70	33	0.08
7[e]	Rh1@Fe4(Zn‐L)6	4‐tBu‐styrene	70	0	–
8[f]	Rh1/Rh2	4‐tBu‐styrene	70	34	0.09

[a] Reagents and conditions: [Rh(acac)(CO)₂]=0.15 mm, [L3]=0.3 mm, [Fe₄(Zn‐L)₆]=0.15 mm, [Substrate]=30 mm, 20 bar H₂/CO (1:1). [b] Ratio of linear and branched aldehyde. [c] All reagents mixed from the beginning of the experiment; reaction time=72 h. [d] Fe₄(Zn‐L)₆ mixed with 1 equiv of C₆₀ fullerene in acetonitrile, and then the Rh4 precursor and substrate were added, and the reaction was carried out for 72 h. [e] The catalytically active species was generated from Rh(acac)(CO)₂ and L3 under 20 bar syngas at RT for 1 h, then the substrate and Fe₄(Zn‐L)₆ were added, and the reaction was carried out at 70 °C for 72 h. [f] No Fe₄(Zn‐L)₆ was present in the catalytic mixture, and the reaction was carried out at 70 °C for 3 h without pre‐activation of the catalyst.