Corrigendum: Strategic Utilization of Multifunctional Carbene for Direct Synthesis of Carboxylic-Phosphinic Mixed Anhydride from CO2.

Abstract

In Scheme 3 of this Communication, the structure of compound 2 g′ was erroneously depicted as oligomeric. According to a recent re-investigation,1 compound 2 g′ is monomeric. This structure and the corresponding text paragraph (starting p. 16076, left column) must be corrected as shown below: “PoxIm 1 g containing bis-N-phosphine oxide groups did not react with carbon dioxide under the ambient conditions, although 1 g was totally consumed in toluene at 80 °C after 1 h (Scheme 3). The quantitative formation of 2 g was confirmed when the product was dissolved in CD3CN at 22 °C; however, a mixture of 2 g and 2 g′ was given in yields of 58 and 42 %, respectively, after changing the solvent from CD3CN to C6D6. Replacement of the solvent from C6D6 to CD3CN again afforded 2 g as the sole product in >99 % yield. Treatment of a mixture of 2 g and 2 g′ in C6D6 with B(C6F5)3 (1.0 equiv) resulted in the quantitative formation of 2 g⋅B(C6F5)3 as the sole product (Scheme 3).” Similar corrections must be made to the Supporting Information. The authors would like to express their appreciation to Dr. Oohora, Osaka University, for his valuable suggestion that a molecular assembly associated by a second-order interaction such as hydrogen-bonding could be often observed as its oligomeric mass by ESI-MS under certain measurement conditions. The authors regret the incorrect identification of the structure of 2 g′ and sincerely apologize for any confusion that this unintentional mistake might have caused.