In the 1H-13C HSQC spectrum of menthol : H1 comes at 1.8 ppm.
H1 comes at 4.2 ppm.
In the methylene CH2 at position 6, the two protons H6 are equivalent.
In the methylene CH2 at position 3, the two protons H3 are diastereotopic.
C4 comes at 31 ppm.
C4 comes at 20 ppm.
C2 comes at 48 ppm.

Must be negative.substance increases

Following are the  advantages of the parametric equations: 1) they can be used to graph curves that are not functions, like the unit circle.2) the parameter can be used to represent the quantity that is  useful to  provide us with better information about the graph.3)  it is useful to convert between rectangular equations and parametric equations.with specific reference to chemistry,  parametric equations are employ for solving hydrogen and hydrogen-like ions, quantum mechanically. herein, cartesian coordinates are converted in spherical polar coordinates. the solution obtained, when plotted on spherical polar graph paper, provides visualization of atomic orbital such as s,p,d and f. 

50? i have no !