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Beilstein J. Org. Chem. 2014, 10, 1817–1825, doi:10.3762/bjoc.10.191
Graphical Abstract
Scheme 1: Catalytic synthesis of organic (poly)carbonates from epoxides and CO2.
Figure 1: Structures of some metal complexes used as catalyst for (cyclic) organic carbonate synthesis.
Scheme 2: Proposed mechanistic cycle for cyclic carbonate synthesis mediated by Zn(salphen) complexes in the ...
Figure 2: Typical 1H NMR spectrum of a sample of a crude mixture in CDCl3 (300 MHz) at rt.
Scheme 3: Proposed mechanism for the formation of cyclic carbonates mediated by an ammonium salt.
Figure 3: Double logarithmic plot and to determinate the order in NBu4I. Conditions: 1,2-epoxyhexane (10 mmol...
Figure 4: Double logarithmic plot to determine the order in binary catalyst Zn(salphen) 1/NBu4I in the presen...
Figure 5: Double logarithmic plot to determine the order in binary catalyst Zn(salphen) 1/NBu4I in the presen...
Figure 6: Double logarithmic plot to determine the order with respect to the binary system NBu4I/Zn complex 1...
Figure 7: Proposed association for complex 2 and schematic structure for bifunctional complex 9.
Figure 8: Double logarithmic plot to determine the order in Zn complex 2. Conditions: 1,2-epoxyhexane (10 mmo...
Scheme 4: On the left a dimetallic mechanism proposed for bifunctional catalyst 2 and on the right a monometa...
Figure 9: Double logarithmic plot to determine the order with respect to the bifunctional Zn complex 2 in the...