Gmss qp 1000 ex mass spectrometer

Melting points were determined on a Stuart melting point device and they are uncorrected. The ¹H and ¹³C-NMR spectra were recorded in DMSO-d₆ as solvent at 300 MHz and 75 MHz, respectively on Varian Gemini NMR spectrometer using Tetramethylsilane (TMS) as internal standard. Chemical shifts are reported in δ units (ppm). The IR spectra were recorded as KBr using a Bruker-vector 22 spectrophotometer FTIR. Mass spectra were measured on a Shimadzu GMSS -QP-1000 EX mass spectrometer at 70 eV. The elemental analyses were performed at the Microanalytical Center, Cairo University.

A Stuart melting point device was used to measure each compound’s melting points and they were uncorrected. DMSO-d₆ was used as a solvent to record the ¹H and ¹³C (the attached proton test, APT) NMR spectra at 300 MHz and 75 MHz, respectively, on a Varian Gemini NMR spectrometer using TMS as an internal standard. Chemical shifts are reported in δ units (ppm). The IR spectra were recorded as KBr using a Bruker-vector 22 spectrophotometer FTIR. A Shimadzu GMSS -QP-1000 EX mass spectrometer was used to measure the mass spectra at 70 eV. All the elemental analyses were performed at the Microanalytical Center, Cairo University (Giza, Egypt).