, J. Am. Chem. Soc, vol.90, p.7011, 1968.
, For a review on the quest for the observation and isolation of oxyallyl derivatives, see, Org. Chem. Front, vol.2, p.1536, 2015.
, Eur. J. Org. Chem, vol.11, p.1, 1994.
, Org. Biomol. Chem, vol.38, p.3109, 1973.
, Angew. Chem. Int. Ed, vol.12, p.6235, 1934.
, Chem. Commun, vol.46, p.3812, 2010.
, Tetrahedron Lett, 1988.
, Org. Biomol. Chem, vol.277, p.2846, 1994.
, Angew. Chem. Int. Ed, vol.48, p.115, 1634.
, J. Am. Chem. Soc, 2011.
, J. Am. Chem. Soc, vol.56, p.2804, 1907.
, J. Am. Chem. Soc, p.2164, 1999.
, J. Am. Chem. Soc, vol.132, p.15533, 2010.
, J. Mater. Chem, vol.18, p.194, 2008.
, Eur. J. Org. Chem, p.3897, 2017.
For related dyes, in which the genuine oxyallyl nature is blurred by H-bonding, J. Am. Chem. Soc, vol.125, p.348, 2003. ,
, Angew. Chem. Int. Ed, vol.52, p.7014, 2013.
, J. Am. Chem. Soc, vol.125, p.7519, 2013.
, A related ferrocene-based derivative was isolated. However it is better described as a zwitterionic enol rather than an oxyallyl: U. Siemeling, p.697, 2010.
, J. Mol. Struct, p.3, 2018.
, Organometallics, vol.36, p.1398, 2017.
, Chem. Commun, vol.52, p.38346, 2016.
For the isolation of a lithium complex, Chem. Commun, p.6834, 2013. ,
, Angew. Chem. Int, vol.56, p.1051, 1031.
, Org. Chem. Front, vol.6, pp.3184-3191, 2019.
, Inorg. Chem, vol.54, p.7636, 2015.
, Calculations were performed with the Gaussian suite of programs: Gaussian09, Revision D.01, 2009.
, Phys. Chem. Chem. Phys, p.6615, 2008.
, Angew. Chem. Int Ed, vol.57, p.4855, 1972.
, Experimental values for isotropic hyperfine constants were extracted from EPR spectra by fitting with the EasySpin simulation package: S. Stoll, A. Schweiger, J. Magn. Reson, vol.178, p.42, 2006.
(i) N-Heterocyclic Carbenes: From Laboratory Curiosities to Efficient Synthetic Tools, Heterocyclic Carbenes-Effective Tools for Organometallic Synthesis, vol.47, p.485, 2007. ,
, Angew. Chem. Int. Ed, vol.129, p.5271, 2007.
, Chem. Rev, vol.77, p.313, 1977.
, Organometallics, vol.28, p.6458, 2009.
, Angew. Chem. Int. Ed, vol.34, p.6172, 2010.
, Eur. J. Inorg. Chem, vol.32, p.6994, 2013.
, Angew. Chem. Int. Ed, vol.52, p.3011, 2013.
, It compares with cyclic (alkyl)amino)carbenes, see: M, p.12940, 2013.
, Eur. J. Inorg. Chem, vol.140, p.3389, 2016.
, For a recent review on switchable and related "smart" NHC, see: E. Peris, Chem. Rev, vol.118, p.9988, 2018.
, For the use of proton-responsive NHC in catalysis, see : (a), vol.29, p.4339, 1786.
, J. Am. Chem. Soc, vol.118, p.863, 1996.
, Struct. Chem, p.375, 2012.
, J. Chem. Soc. Perkin Trans. II, p.1, 1987.