Melting points (m.p.) were determined using a BÜCHI B-540 (Flawil, Switzerland) melting point apparatus and were uncorrected. The elemental analysis (C, H, N) was performed on a CHNS/O Elemental Analyzer 2400 Series II (Perkin-Elmer, Waltham, MA, USA). The IR spectra were measured with a Perkin-Elmer FT-IR 1725X spectrophotometer (Perkin-Elmer, Waltham, MA, USA) (in KBr) in the range of 600–4000 cm−1. The NMR spectra (1H NMR) were recorded in DMSO-d6 using a Mercury 400 (Varian, Palo Alto, CA, USA) or Bruker DRX 500 (Bruker Daltonics, Inc., Billerica, MA, USA). Chemical shifts (δ, ppm) were described in relation to tetramethylsilane (TMS) and coupling constants (J) expressed in Hz. The MS spectra (EI, 70 eV) were recorded using the apparatus AMD-604 (AMD Analysis & Technology AG, Harpstedt, Germany).
Ft ir 1725x spectrophotometer
Manufactured by PerkinElmer
Sourced in United States
The PerkinElmer FT-IR 1725X is a Fourier Transform Infrared (FT-IR) spectrophotometer. It is designed to analyze the infrared spectrum of a sample, providing information about its chemical composition and molecular structure. The FT-IR 1725X uses an interferometer to generate and detect infrared radiation, which is then processed using Fourier transform algorithms to produce the final spectrum.
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Lab products found in correlation
3 protocols using ft ir 1725x spectrophotometer
1
Analytical Characterization of Organic Compounds
2
Characterization of Novel Compounds
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Melting points (m.p.) were determined using a BÜCHI B-540 (Flawil, Switzerland) melting point apparatus and they were uncorrected. The elemental analysis (C, H, N) was performed on Perkin-Elmer 2400. The elemental analysis was within 0.5% of the theoretical value. The purity of compounds was monitored by reverse-phase high-performance liquid chromatography (RP-HPLC), RP-18/MeOH/H2O chromatography. The MS spectra (EI, 70 eV) were recorded using the apparatus AMD-604. The IR spectra were registered on the Perkin-Elmer FT-IR 1725X spectrophotometer (in KBr) in the range of 600–4000 cm−1. The NMR spectra (1D, 1H NMR, and 13C NMR) were recorded in DMSO-d6 using a Bruker DRX 500 (Bruker Daltonics, Inc. Billerica, MA, USA). Chemical shifts (δ, ppm) were described in relation to tetramethylsilane (TMS) and the coupling constants (J) were expressed in Hz.
3
Synthesis and Characterization of Steroid Derivatives
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All synthetic reagents were analytically pure and solvents were prepared according to the standard procedures before being used. The starting steroid derivatives were purchased from Galenika AD (Belgrade, Serbia) and were recrystallized from a suitable solvent. Flash column chromatography (FCC) was carried out with Merck silica gel 0.040-0.063 mm. Thin layer chromatography (TLC) was carried out on precoated silica gel 60 F 254 plates. Melting points were determined on a Digital melting point WRS-1B apparatus and are uncorrected. IR spectra were recorded with Perkin-Elmer FT-IR 1725X spectrophotometer. 1 H and 13 C NMR spectra were recorded in DMSO-d 6 and/or CDCl 3 with Bruker Avance 500 ( 1 H at 500 MHz, 13 C at 125 MHz) and Varian Gemini-200 spectrometers ( 1 H at 200 MHz, 13 C at 50 MHz) and TMS was used as an internal reference. Chemical shifts (δ) are measured in ppm and coupling constants (J) in Hz. The homonuclear 2D (NOESY, COSY) and the heteronuclear 2D 1 H- 13 C spectra (HSQC, HMBC) were recorded with the usual settings. The high-resolution mass spectra (HRMS) were taken with Agilent 6210 TOF LC/MS or Thermo Scientific HESI-LTQ Orbitrap XL spectrometers. Elemental analyses were performed on Vario EL III.
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