Statement

Abstract

Not C5Me5+ (III): Because of the evidence presented in the above Correspondence the authors are retracting the conclusions of their publication “The Stable Pentamethylcyclopentadienyl Cation” which were entirely those of the main author and imply no reflection on the part of his co‐workers (whose experimental and theoretical work is valid).

CO2, NOx and SOx removal from flue gas via microalgae cultivation: A critical review

“…The protein of interest was designed to include the tobacco etch virus protease (TEVp) target peptide sequence (ENLYFQ↓C) at the N terminus, with the C terminus fused to an intein (Figure 1). The use of TEVp to generate an N‐terminal Cys overcomes some of the limitations in existing methods, such as internal cleavage of the desired protein, because of its high sequence specificity 22. Additionally, the high cleavage efficiency of this protease shortens reaction time, thereby avoiding target protein degradation.…”

“…The reaction was performed in Tris ⋅ HCl buffer (pH 8.0) at 4 °C for 16 h, and the resulting eluent contained protein‐Cys (i.e., C‐Cys‐eGFP, C‐Cys‐MBP, or C‐Cys‐GST). Alternatively, to generate proteins containing an N‐terminal cysteine (Cys‐protein), the expressed fusion protein was immobilized on a chitin column followed by addition of TEVp and dithiothreitol (DTT) to cleave the substrate at the N terminus16, 22 and release Cys‐protein (i.e., N‐Cys‐eGFP, N‐Cys‐MBP, and N‐Cys‐GST) from the fusion protein. These two reactions were performed in a one‐pot two‐step manner at 4 °C for 16 h. Because of the high efficiency of TEVp cleavage and its inability to react with CBT derivatives, trace amounts of TEVp were not removed from the protein solution.…”

A Computational Study on a Strategy for Isolating a Stable Cyclopentadienyl Cation

“…[4][5][6] There was an erroneous report in 2002 of the isolation of pentamethylcyclopentadienyl cation 2 as a surprisingly stable solid. [7] However, very soon thereafter the isolated material was identified as 3. [8][9][10][11] The isolobal neutral boron-centered analogues (boroles) have recently experienced a resurgence of interest.…”

“…[7] However, very soon thereafter the isolated material was identified as 3. [8][9][10][11] The isolobal neutral boron-centered analogues (boroles) have recently experienced a resurgence of interest. [12] The pentaphenyl borole ring (4) was reported some time ago, [13] but the determination of the solid-state structure by Braunschweig and co-workers in 2008 led to a substantial increase in activity.…”

Carbocations in Superacid Systems

“…(3.148)]. [1090][1091][1092][1093][1094] Particularly revealing is the C(4)-C(5) bond length (1.51 Å) of the reported X-ray structure, which is too long for a carbon-carbon double bond. [1090][1091][1092][1093][1094] Particularly revealing is the C(4)-C(5) bond length (1.51 Å) of the reported X-ray structure, which is too long for a carbon-carbon double bond.…”