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Based on Crystal Field Theory, discuss why [MnO4] is deeply coloured.
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- Predict 31PNMR spectrum of cis-[Pt(PR3)2Cl2]. Given that phosphorus-31 (100% abundant), platinum-95 (33% abundant), all have a nuclear spin quantum numbers of (I = ½)The complex ion [Fe(OH2)6]3+ has an electronic absorption spectrum with a maximum at 700 nm. Estimate a value of Δo for the complex.) trans-[Co(en)2Cl2]Cl is a chiral compound ) The coordination number for the anionic complex in K3[Cr(C204)3]•3H2O is 3 ) During the synthesis of K3[Cr(C2O4)3]•3H2O, the reducing agent is oxalic acid. ) For a vibrational mode to be Raman active, it must give rise to a change in dip ) The C=O bond has a vibrational frequency higher than the C-O bond vibration () mid-IR region is from 4000 cm-l to 14000 cm
- Predict what you expect to observe in the EPRspectrum of a species in which an unpaired electroninteracts with one 14N nucleus (I = 1) and one 1Hnucleus (I = 1/2) if the hyperfine coupling constantsare (a) A(14N) = A(1H)=30 G; (b) A(14N)= 30 G,A(1H)= 10 G.When using spin-spin splitting to interpret an NMR spectrum we use the equation 2n + 1 to indicate the number of peaks an NMR absorbance has been split into. What does the “n” stand for?INORGANIC Magnetic susceptibility: Compare the two compounds spin state- how can these two compounds be compare and contrast? Product µeff µs [(Me5dien)CoCl2 4.43 BM 3.87 BM [Me5dien)Co(SCN)2] 4.26 BM 3.87 BM
- Use group theory to predict the number of v(CO) stretching vibrations you would expect to observe in the IR and Raman spectra of cis and trans isomers of Mo(CO)4(PPh3)2. Can these isomers be differentiated by vibrational spectroscopy? (ii) Can these isomers be differentiated by 31P{H} and 13C {¹H} spectroscopy? Fully explain your answer in both cases explaining what you would expect to see in each spectrum. (iii) Reaction of both isomers with more PPh3 affords mixtures of fac and mer isomers of [Mo(CO)3 (PPh3)3]. Give the point groups for each. Can they be distinguished by IR spectroscopy? Please give me all answers2. A combined system is formed from two separate systems of N localized atoms of spin-1/2 each. While the two systems remain separate (a) Find the number of configurations which give a total spin excess S = S, +S, where S, and S, are the excess spins of the separate systems. (b) For what values of S, and S, is this number of configurations maximum?5. For a d7 complex, write all possible spin-allowed transitions, including the ground state and excited state molecular term symbols involved and approximate E/B values for: (i) Aoct/B = 10; (ii) Aoct/B = 30.
- (a) Determine the number and activities of the carbonyl stretching modes of both the cis and trans isomers of L2M(CO)4. (b) Calculate the IR and Raman active carbonyl vibrations for both isomers. (c) Fe(CO)4C12 has IR bands at 2167, 2126 and 1082 cm-1 in CHC13 solution. How would you interpret this spectrum?The UV-vis. absorption spectrum of an aqueous solution of [Mn(OH2)6]2* displays a large number of d-d absorption bands in the visible region (all ɛ < 0.1 M-1 cm-1). i) Determine the Russell-Saunders ground state term for the Mn(II) free ion. Show your working. ii) Write down the selection rules that govern electronic transitions. iii) With reference to part ii), explain the magnitude of the molar absorption coefficients for [Mn(OH2)6]2*. To illustrate your answer, show that one of the excited state terms for Mn(II) free ion is 4G.A complex of formula [M(N ≡ CCH3)6](NO3)2, in which the M(II) ion is that of a firstrow (3d) transition metal, has a magnetic moment of μeff = 2.83 B.M What is the possible identity of the M(II) ion?