T-groups

Lythall, R.T., Group motor control boards. Electrical Review 30 June (1961). 

Figure 12.4 IODO-BEADS contains immobilized chloramine-T groups that can react with radioactive iodide in...

Juengst, E.T., "Group Identity and Human Diversity Keeping Biology Straight from Culture," Am.. Hum. Genet., 63, 673-677 (1998a). 

Juengst, E.T., "Groups as Gatekeepers to Genomic Research Conceptually Confusing, Morally Hazardous, and Practically Useless," Kennedy Inst. Ethics ]., 8, 183-200 (1998b). 

Tritium in the C-O-T groups, resulting from neutralisation of the carbenium ions, is removed by exchange during work-up of the polymers. 

In natural melts, the presence of high field strength ions such as Fe , TF, and P, which, like silicon, preferentially assume a tetrahedral coordination with oxygen, complicates the structure, and the constitution of the anion matrix may not be deduced on the basis of the equations in section 6.1.2. Structural parameters valid for compositionally complex melts were proposed by Mysen et al. (1980) and Virgo et al. (1980) on the basis of the results of Raman spectroscopy. These parameters are NBO/Si and NBO/T (NBO = Non-Bridging Oxygen T groups all tetrahedrally coordinated cations—i.e., Fe ", TF, P ", ... 

Problem 1.4 (a) Are the covalences and group numbers (numbers of valence electrons) of the elements in Table 1-1 related (fe) Do all the elements in Table 1-1 attain an octet of valence electrons in their bonded states (c) Why aren t Group 1 elements included in Table 1-1 ... 

Grant, D.J.W and Higuchi, T. Group contributions in prediction.Satubility Behavior of Organic Compounds, Techniques of Chemistry, Vol. 21, John Wiley Sons, New York, NY, 1990, Chapter 7. 

These may be classified into at least eleven groups but the five most impoit t groups are ... 

The [122]" anion in [MePh3P]4l22 consists oftwo L-shaped [15] units bridged by an iodine molecule and completed by two end-on [T]" groups. ... 

A variety of liquid and solid resins can be prepared by varying the T/D ratio. Commercial TD resins are available, containing from 5 to 95% T groups. Mixtures of methji and phenylchlorosilanes are also frequendy used. Some TD resins are modified by the addition of catalysts to reduce the silanol content, thereby increasing the molecular weight. Contrary to MQ resins, which are very stable, TD resins are unstable toward silanol condensation... 

---