This what I have gotten from working out the questions asked. Can some one double check me and see if it is correct. If not can you provide a step by step explaination.

In the case of molecule, "A", there are three bonds linking the ring system on the left to the positively charged nitrogen atom in the ring system on the right. If the length of a bond is a, then the length of the delocalized bonding system is 3a. In the particle in a box model we can thus set 2L=2a. Upon substitution of n=3 and L=3a in Eq.(1.4), we get the result, L=3a 1=8mc(3a)27h Now consider 1,1'-diethyl-2,2'-carbocyanine chloride molecule whose structure is shown below. We shall refer to this molecule as "B". Answer the following questions: (1) What is the value of " n " for the HOMO for molecule "B". (2) If a is the length of a bond, what is the value of L for this molecule? (3) If molecule "A" absorbs light with wavelength 555nm, at what wavelength does molecule " B " absorb. n=4 1=8mL2[2(4)+1h2 1=8mL29h2 (b) c=8mL29h2(hc1) 1=8mL29h =9h8mL2=9(6.6261034J8s)8(9.1091031kg)(2,998108m)(0.114)2 =416nm