ChemInform Abstract: SYNTHESIS OF N‐(TRIALKYLSILYL)‐1,3,2‐OXAZAPHOSPHORINANES

Kurochkin, V. V.; Zavalishina, A. I.; Sorokina, S. F.; Нифантьев, Э. Е.

doi:10.1002/chin.197933286

Cited by 2 publications

(2 citation statements)

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“…In contrast to previous studies, we obtained a 28 day coverage of the high-quality data, including four colour light curves, of 1- Kurochkin (1979), 2-Kurochkin (1965), 3-Eggen (1967), 4-Millis (1972), 5-Kurochkin (1970), 6-Whelan et al (1979, 7-Estimated from light curves of Gilliland et al (1991), 8-Diethelm (1998 the overcontact binary system AH Cnc. The multi-colour solution of the system allows us to determine more accurate orbital and physical parameters of the binary than the earlier studies.…”

Section: Ah Cncmentioning

confidence: 99%

Close binary and other variable stars in the solar-age Galactic open cluster M 67

Yakut

Zima

Kalomeni

et al. 2009

A&A

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We present multi-colour time-series CCD photometry of the solar-age galactic open cluster M 67 (NGC 2682). About 3600 frames spread over 28 nights were obtained with the 1.5 m Russian-Turkish and 1.2 m Mercator telescopes. High-precision observations of the close binary stars AH Cnc, EV Cnc, ES Cnc, the δ Scuti type systems EX Cnc and EW Cnc, and some long-period variables belonging to M 67 are presented. Three full multi-colour light curves of the overcontact binary AH Cnc were obtained during three observing seasons. Likewise we gathered three light curves of EV Cnc, an EB-type binary, and two light curves of ES Cnc, a blue straggler binary. Parts of the light change of long-term variables S1024, S1040, S1045, S1063, S1242, and S1264 are obtained. Period variation analysis of AH Cnc, EV Cnc, and ES Cnc were done using all times of mid-eclipse available in the literature and those obtained in this study. In addition, we analyzed multi-colour light curves of the close binaries and also determined new frequencies for the δ Scuti systems. The physical parameters of the close binary stars were determined with simultaneous solutions of multicolour light and radial velocity curves. Finally we determined the distance of M 67 as 857(33) pc via binary star parameters, which is consistent with an independent method from earlier studies.

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Section: Ah Cncmentioning

confidence: 99%

Close binary and other variable stars in the solar-age Galactic open cluster M 67

Yakut

Zima

Kalomeni

et al. 2009

A&A

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“…The reaction of alkylphosphorodichloridites with N,N,O-tris(trimethylsilyl)-3-aminopropanol afforded 2-alkoxy-3-trimethylsilyl-1,3,2-oxazaphosphorinanes. 25 Cyclic products are also formed in the reaction of N,N 0bis(methylchlorophosphino)urea with amines 1 and 2. 26,27 It is worth noting that in this case the nucleophilicity of the amide nitrogen atom becomes comparable with that of the nitrogen atom in silylamines.…”

Section: Reactions With Trivalent Phosphorus Acid Halidesmentioning

confidence: 99%