Spectrum editing

ID C (with spectrum editing) ID, (DEPT or APT) Carbon count and multiplicity determination (C, CH, CH2, CH3). Can often be avoided by using proton-detected heteronuclear 2D experiments. [Pg.11]

D one-bond correlation (with spectrum editing) HMQC or HSQC (with editing) Carbon assignments transposed from proton assignments. Proton spectrum dispersed by C shifts. Carbon multiplicities from edited HSQC (faster than above ID approach). [Pg.11]

DEPT Distortionless enhancement by polarisation transfer (spectrum editing) 4.4.3... [Pg.373]

SEFT Spin-echo Fourier transform (spectrum editing) 4.3.1... [Pg.374]

A comparison of DEPT-135 with both the original and enhanced DEPTQ is made in Pig. 4.36 demonstrating the retention of quaternary centres and the improved performance achievable with the enhanced version. This method would now appear to be the optimal approach to spectrum editing with retention of all carbon centres and is attractive as a routine carbon-13 screening tool for the organic laboratory. The use of frequency-swept (adiabatic) 180° pulses is equally valid for the standard DEPT sequence, or indeed any using 180° pulses, and should also provide enhanced performance when large carbon bandwidths become problematic see Chapter 10 for more information on these. [Pg.125]

See also in sourсe #XX -- [ Pg.125 , Pg.126 , Pg.127 , Pg.128 , Pg.129 , Pg.130 , Pg.131 , Pg.132 , Pg.133 , Pg.134 , Pg.135 , Pg.136 , Pg.137 , Pg.138 , Pg.139 , Pg.140 , Pg.141 , Pg.142 ]

See also in sourсe #XX -- [ Pg.111 , Pg.112 , Pg.113 , Pg.114 , Pg.115 , Pg.116 , Pg.117 , Pg.118 , Pg.119 , Pg.120 , Pg.121 , Pg.122 , Pg.123 , Pg.124 , Pg.125 ]

See also in sourсe #XX -- [ Pg.129 ]

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