Transition probabilities of lines with origin in the 3d′(5/2)2, 3d′(5/2)3 and 3d′(3/2)1 levels of Ne(I).
✍ Scribed by Piedad Martin; Jose Campos
- Publisher
- Elsevier Science
- Year
- 1978
- Tongue
- English
- Weight
- 201 KB
- Volume
- 19
- Category
- Article
- ISSN
- 0022-4073
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## Abstract magnified image An efficient one‐pot access for the synthesis of the previously unreported tetracyclic fused pyrimido‐[4″,5″:4′,5′]thieno[3′,2′:4,5]thieno[3,2‐__d__]pyrimidine (**3**) and 1,2,3‐triazine[4″,5″:4′,5′]thieno‐[3′,2′:4,5]thieno‐[3,2‐__d__]‐1,2,3‐triazine (**5**) heteroaroma
and [3,4-d] pyrimidines (15a) have been achieved by using hydroxymethylene derivatives of relevant cholestanones prepared from cholesterol (1). Their CD spectra exhibit at least three Cotton effects between 300 to 200 nm, a first CD band around 290, a second one around 260 and a third one around 22