Building Blocks and Elements - Part Three

This section on building blocks will examine BIRD related sequence units and filter elements. It might appear strange to separate the BIRD and TANGO sequence element from other filters but the BIRD element is an extremely versatile element being used for both filter and purging elements and as such, merits a section in its own right. 

1 BIRD, TANGO and BANCO as Members of the Same Family 

A more theoretical description using Cartesian product operators is given in Table 5.23. 

NMR-SIM is an extremely well equipped to study the performance of such sequence units and to examine the limitations and possible improvements of such elements. 

Using the configuration file ch5812.cfg as basis, write a pulse sequence according to the scheme shown below. Run a simulation to test the efficiency of the t2c coherence suppression for several protons with a variety of Ti relaxation times. 

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Because of its small size and s p electronic ground state, boron is unique among the elements with its predilection for sp hybridized trigonal planar coordination. However, given the acidic character of the unfilled octet, hybridization to tetrahedral BO4 configurations is also important. These simple elementary units may be found as discrete anions but more often they are utilized as building blocks of more complicated ions or as part of extended two and three-dimensional stmctures. 

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