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Tris(trimethylsilyl)methane as an internal 13 C NMR chemical shift thermometer
Author(s) -
Sikorski William H.,
Sanders Aaron W.,
Reich Hans J.
Publication year - 1998
Publication title -
magnetic resonance in chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.483
H-Index - 72
eISSN - 1097-458X
pISSN - 0749-1581
DOI - 10.1002/(sici)1097-458x(199806)36:13<s118::aid-omr321>3.0.co;2-4
Subject(s) - chemistry , thermometer , trimethylsilyl , methane , solvent , tris , chemical shift , nuclear magnetic resonance spectroscopy , analytical chemistry (journal) , inert , inert gas , organic chemistry , thermodynamics , physics , biochemistry
Tris(trimethylsilyl)methane has excellent properties for an internal chemical shift thermometer to measure temperatures in 13 C DNMR spectroscopy [Δδ between the 13 C signals of Si(CH 3 ) 3 and CH carbons]. It is chemically inert, soluble in most organic solvents and has an almost linear dependence of Δδ on temperature. The sensitivity (approximately 1°C Hz ‐1 at 90 MHz) allows the measurement of temperature to within 1°C. The chemical shift is solvent dependent, so each solvent mixture must be calibrated. Calibrations are presented for seven solvents. © 1998 John Wiley & Sons, Ltd.