Sawbuck and the Roman numeral X (10), which formerly appeared on $10 bills. A "double sawbuck" is a twenty dollar bill. Sawbuck A sawbuck is a device for holding wood so that it may be cut into pieces. Easily made in the field from rough material, it consists of an "X" form at each end which are joined by cross bars below the intersections of the X's. The stock to be cut is placed in the V's formed above the intersections of the X's. A sawbuck is very simple to build. The five "V" sawbuck was designed with 10 vertical 2×4s,
A value molecule. This leads to a problem when there are possible stabilizing electronic factors in a different system. The carboxylic acid substituent shown below is axial in the ground state, despite a positive A-Value. From this observation, it is clear that there are other possible electronic interactions that stabilize the axial conformation. It is important to note that A-values do not predict the physical size of a molecule, only the steric effect. For example, the tert-butyl group (A-value=4.9) has a larger A-value than the trimethylsilyl group (A-value=2.5), yet the tert-butyl group actually occupies less space. This difference can be attributed to