Technique for Importing Greater Evolution Resolution in Multidimensional NMR Spectrum

Solid-state13C chemical shift tensors in terpenes. Part I. Spectroscopic methods and chemical shift structure correlations in caryophyllene oxide

“…Comparable analyses performed in our laboratory without the advantages of TIGER processing have typically required 2È4 times longer. 4 The additional beneÐt of running the analysis in 21.3 h as two separate experiments provided a 2.9 factor in the time savings over a single TIGER analysis of sufficient S/N (estimated to take 62.6 h) to observe simultaneously both sp2 and sp3 carbons. Thus, the judicious design of PHORMAT experiments can yield even greater time savings.…”

“…A more complete discussion of these issues is given elsewhere. 4 PHORMAT data for caryophyllene oxide were collected and TIGER processed to determine the minimum time required for a successful analysis. Two separate datasets were collected, one with high resolution but low signal averaging per evolution increment suited to the closely spaced aliphatic carbons, while the second set emphasized S/N but reduced resolution for the well separated oleÐnic carbons.…”

The 13C Chemical Shift Tensor Principal Values and Orientations in Dialkyl Carbonates and Trithiocarbonates

“…The acquisition parameters used were a spectral width of 24 and 4 kHz in the acquisition and evolution dimensions, respectively, a proton 908-pulse width of 3:7 ms; a carbon 908-pulse width of 4:1 ms; and a contact time of 6 ms: Complex points, 1024 and 8, were collected in the acquisition and evolution dimensions, respectively. The 2-D data set was transferred to a Sun computer and analyzed as described previously [3,12].…”

ANAFOR: Application of a Restricted Linear Least Squares Procedure to NMR Data Processing

“…TIGER applies to multidimensional (mD) experiments and requires the summation onto one of the indirect dimensions to be isotropic and known in advance. Under such conditions, TIGER has successfully been applied to several multidimensional experiments such as chemical shift correlation or MAT [13].…”

“…Linear prediction [12] is probably the best-known application of that concept in NMR, and recently the TIGER procedure has been proposed [13]. TIGER applies to multidimensional (mD) experiments and requires the summation onto one of the indirect dimensions to be isotropic and known in advance.…”