Carbon-13 NMR studies of some organotin(IV) compounds |
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| Affiliation: | 1. Department of Chemistry, Shoolini University, Solan, HP 173212, India;2. S.O.S in Chemistry, Jiwaji University, Gwalior, MP 474011, India;3. Department of Chemistry, Indian Institute of Technology, Kanpur 208016, India;4. Department of Chemistry, Dayalbagh Educational Institute Agra, UP 282005, India;5. Department of Physics, Aringnar Anna Government Arts College, Cheyyar, 604407, India;6. Department of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia;7. Department of Chemistry, Institute of H. Science, Khandari, Dr. Bhimrao Ambedkar University, Agra, UP 282002, India;1. Department of Chemical Engineering, Faculty of Engineering, Ardakan University, P.O. Box 184, Ardakan, Iran;2. Department of Chemistry, Payame Noor University, 19395-3697 Tehran, Iran;3. Department of Chemistry, University of Mianwali, Mianwali, Pakistan;4. Department of Chemistry, University of Sargodha, Punjab, Pakistan;5. Department of Physics, University of Sargodha, Punjab, Pakistan |
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| Abstract: | The 13C chemical shifts and 13C−119Sn, 117Sn coupling constants for several organotin(IV) compounds RxSnCl4−x (R = Me, Bun, Ph; x = 1−4) have been measured in both inert (CDCl3) and donor (DMSO-d6) solvents, as have 13C data for the compounds RxSnR′4−x (R = Me, Ph; R′ = Bun and R = Me; R′ = Ph; x = 1−3) and the compounds Me3SnX (X = pseudo halide). The δ and 1J(C-Sn) values appear to depend mainly on the type and number of substituents on tin and the donor ability of the solvent. There are linear relationships between the number of substituents (x) and both δ and 1J(C-119Sn) for almost the RxSnX4−x series (R = Me, Bun, Ph; X = Cl and R = Me, Bun; X = Ph; x = 1−4), when measured in a single solvent, e.g. CDCl3. There is an excellent linear relationship between 1J(C-119Sn) and 2J(1HC-119Sn) for the compounds MexSnCl4−x. Determination of 13C data for Me3SnCl and Ph3SnCl in a range of solvents reveals that the value of 1J(C-Sn) increases with the donor ability of the solvent.The marked increase in the values of 1J(C-119Sn) in DMSO-d6 for the compounds RxSnCl4−x(R = Me, Bun,Ph) on going progressively from x = 4 to x = suggest tin coordination numbers of 4, 5, 6 and 6, respectively. Some additional physical data are presented for the isolated complexes from DMSO and the compounds PhxSnCl4−x(x = 1−3) and Me3SnX with X = N3 or OCOMe. |
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