Heterodinuclear zinc and magnesium catalysts for epoxide/CO₂ ring opening copolymerizations

Abstract

Correction for ‘Heterodinuclear zinc and magnesium catalysts for epoxide/CO₂ ring opening copolymerizations’ by Gemma Trott et al., Chem. Sci., 2019, DOI: 10.1039/c9sc00385a.

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In the original manuscript, an error was made in Table 2 for entries 1–3. Incorrect TON and TOF values were reported for compounds 2b, 2c and 2e at a pressure of 1 bar. Also the PCHC selectivity values for 2b and 2c at 1 bar were incorrect. The correct TON, TOF and PCHC values for these compounds are shown below:

Table 2 Copolymerization reaction conditions^a

Cat.	Catalyst (mol%)	Temp. (°C)	Pressure (bar)	PCHC^b (%)	TON^b	TOF^b (h^−1)	M n [Đ]^b
a Reactions were carried out in a Parr high pressure vessel with an impeller at 20 bar. b See Table 1 and ESI for all data (Fig. S56–S60).
2b	0.1	120	1	>96	377	435	12 280 [1.04]
							5340 [1.13]
2c	0.1	120	1	>93	419	466	14 490 [1.06]
							5930 [1.15]
2e	0.1	120	1	>99	430	645	21 760 [1.04]
							9090 [1.15]
2c	0.01	120	20	>99	4415	8830	44 400 [1.04]
							21 200 [1.05]
2c	0.005	120	20	>99	5435	1359	54 380 [1.04]
							26 550 [1.04]

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To highlight this update, the sentence in the original manuscript “For the Zn(II)/Mg(II) complexes, the best activity value reaches 654 h⁻¹ which is at the upper end of values for the low pressure regime.^10,14,15” on page 7 should now read “For the Zn(II)/Mg(II) complexes, the best activity value reaches 645 h⁻¹ which is at the upper end of values for the low pressure regime.^10,14,15”

Finally, a corrected version of Fig. 4 is also provided here to highlight the correct TOF value for complex 2e.

Fig. 4 Illustration of the structures, activity and selectivity for some of the highest performing catalysts reported for CO₂/CHO ROCOP.^{22,25,33,34,59,61}

The original ESI was replaced by a correspondingly revised version on 16th May 2019 to reflect these changes.

The Royal Society of Chemistry apologises for these errors and any consequent inconvenience to authors and readers.

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Footnote

† Electronic supplementary information (ESI) available. See DOI: 10.1039/C9SC00385A

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