𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Substituent chemical shifts of the organotin moiety in compounds of the type RSnMenCl3 − n (n = 0 to 3; R = n-alkyl)

✍ Scribed by Terence N. Mitchell

Publisher
John Wiley and Sons
Year
1976
Tongue
English
Weight
541 KB
Volume
8
Category
Article
ISSN
0749-1581

No coin nor oath required. For personal study only.

✦ Synopsis

The 13C and '18Sn NMR spectra of 33 organotin compounds of the type RSnMe,Cl,_, and related types are discussed. The substituent effects of the groups SnMe,, SnMe,Cl, SnMeC1, and SnCI, (and of some related groups) on the carbon chemical shifts in the alkyl group R have been determined; the SnMe, group causes a small upfield shift of the carbon attached to it, while the other groups cause downfield shifts. The shifts show a monotonic change on replacing methyl groups in Me,Sn by chlorine atoms. The effects on carbons further removed from the tin atom are discussed. Variation in R causes little change in "J(Sn-C) or 6(l19Sn). TABLE 7. llsSn CHEMICAL SHIFTS& OF COMPOUNDS RSnCI,Me,-, (n = 0 TO 3); S(Me,Sn

📜 SIMILAR VOLUMES

The role of ?-type nonbonding orbitals f
The role of ?-type nonbonding orbitals for spin-orbit induced NMR chemical shifts: DFT study of13C and19F shifts in the series CF3IFn (n=0, 2, 4, 6)
✍ Kaupp, Martin; Malkina, Olga L.; Malkin, Vladimir G. 📂 Article 📅 1999 🏛 John Wiley and Sons 🌐 English ⚖ 246 KB 👁 2 views

type nonbonding orbitals on heavy halogen or related substituents are largely responsible for significantly shielding spin᎐orbit-induced Ž . heavy-atom effects on nuclear magnetic resonance NMR chemical shifts of the neighboring atoms. This suggestion has been examined and confirmed by Ž . 13 densi

Regio- and enantioselectivity in the alk
Regio- and enantioselectivity in the alkylation and etherification reactions of cinnamyl allylic derivatives catalyzed by [(η5-C5R5)Ru(N–N*)(NCCH3)]PF6 (R = H, Me) complexes containing N–N* bulky chiral ligands of different rigidity and flexibility
✍ Maria Saporita; Giovanni Bottari; Giuseppe Bruno; Dario Drommi; Felice Faraone 📂 Article 📅 2009 🏛 Elsevier Science 🌐 English ⚖ 206 KB

a b s t r a c t [( 5 -C 5 R 5 )Ru(N-N\*)(NCMe)]PF 6 (R = H, N-N\* = (Sa)-1, 5; (Sa)-2, 6; (R,R)-3, 7; (R,R)-4; 8; R = Me, N-N\* = (Sa)-1, 9) complexes containing N-N\* bulky chiral ligands of different rigidity and flexibility were synthesized by reacting the precursor [( 5 -C 5 R 5 )Ru(NCMe) 3 ]PF

Investigation the chemical reactivity of
Investigation the chemical reactivity of positions N-3, C-5 and C6-methyl group in biginelli type compounds and synthesis of new dihydropyrimidine derivatives
✍ Y. R. Mirzaei; H. Azamat; H. Namazi 📂 Article 📅 2001 🏛 Journal of Heterocyclic Chemistry 🌐 English ⚖ 45 KB 👁 1 views

## Abstract The compounds 5‐ethoxycarbonyl‐1,6‐dimethyl‐4‐(3‐nitrophenyl)‐3,4‐dihydropyrimidin‐2(l__H__)‐one (5) and 5‐ethoxycarbonyl‐1‐phenyl‐6‐methyl‐4‐(3‐nitrophenyl)‐3,4‐dihydropyrimidin‐2(l__H__)‐one (1) were prepared by the Biginelli condensation method and they converted to eight N‐3 substit