The 15N-{1H} spectrum , recorded at 10.1 MHz, of the square-planar complex \left[{ }^{195} \mathrm{Pt}\left({ }^{15} \mathrm{NH}_{3}\right) \mathrm{a}\left(\mathrm{H}_{2} \mathrm{O}\right)\right]^{2+}\left(\mathrm{ClO}_{4}^{-}\right)_{2} \text { is shown schematically in Figure } 4 . (a)

What does the symbol {1H} mean, and why would this type of spectrum beused for this complex? (b) Using the method of successive splittings, draw the splitting diagram that you would expect for [Pt(1NH3):(H2O)]*, and use this to account for the form of the spectrum observed. You should include an explanation of the number of lines and their relative intensities in your answer. [Note: ?J(N, N) coupling would normally be expected but unfortunately is not observable in this spectra.] (c) Determine the values of the chemical shifts for the N resonances and the coupling constants (in Hz). (d) Describe the 195Pt-{'H} spectrum that you would expect for this complex.