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Profile mass spectrometer

Manufactured by Shimadzu

The Profile mass spectrometer is a versatile analytical instrument designed for the identification and quantification of chemical compounds. It utilizes high-resolution mass spectrometry to precisely measure the mass-to-charge ratio of ionized molecules, enabling the determination of their elemental composition and molecular structure.

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4 protocols using profile mass spectrometer

1

Synthesis and Characterization of Air-Sensitive Organometallic Compounds

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All experiments were performed
under a nitrogen atmosphere using standard Schlenk or glovebox techniques.
Solvents were dried using a column solvent purification system.56 (link) Commercial KOtBu (97%), MeLi (1.6
M in Et2O), MeI, MeOH, Et3N, 2-adamantanone,
benzophenone, acetone (99%), 9-fluorenone, and 1,2-diphenylcyclopropenone
were used as purchased. 1H (299.95 MHz), 13C
(75.43 MHz), and 29Si (59.59 MHz) NMR spectra were recorded
on a Varian INOVA 300 spectrometer either in C6D6 solution using the internal 2H-lock signal of the solvent
or in toluene solution with a D2O capillary as an external
lock. Chemical shift values are referenced versus TMS. Compounds 1 and 2b were synthesized according to published
procedures.28 (link) HRMS spectra were run on
a Kratos Profile mass spectrometer equipped with a solid probe inlet.
Infrared spectra were obtained on a Bruker Alpha-P Diamond ATR spectrometer
from the solid samples. Melting points were determined in capillaries
melted off on one side using a Büchi 535 apparatus and are
uncorrected. Elemental analyses were carried out on a Hanau Vario
Elementar EL apparatus. UV absorption spectra were recorded on a PerkinElmer
Lambda 5 spectrometer.
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2

Synthesis of Cyclopentasilane and Imidazolium Compounds

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All experiments were performed under a dinitrogen atmosphere using standard Schlenk techniques. Solvents were dried using a column solvent purification system.[27] Commercial reagents were used as purchased unless otherwise noted. 1H (299.95 MHz), 13C (75.43 MHz) and 29Si (59.59 MHz) NMR spectra were either recorded on a Varian INOVA MHz 300 or a Varian Mercury MHz 300 spectrometer in C6D6 or THF‐d8 solutions and referenced to TMS using the internal 2H lock signal of the solvent. 1‐chloro‐3,3,4,4‐tetramethyl‐2,2,5,5‐tetrakis (trimethylsilyl)cyclopenta‐silane[13] and 1,3,4,5‐tetramethylimidazol‐2‐ylidene (IMe4)[28] were synthesized according to published procedures. HRMS spectra were recorded on a Kratos Profile mass spectrometer. Infrared spectra were obtained on a Bruker Alpha‐P Diamond ATR Spectrometer from the solid sample. Melting points were determined using a Buechi 535 apparatus and are reported uncorrected. Elemental analyses were carried out on a Hanau Vario Elementar EL apparatus. Irradiations were carried out using a Kessil PR160L blue (λ=456 nm, 50 W) light LED lamp, with the reaction vessel placed approximately 2 cm from the light source, whilst being cooled by an external fan.
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3

Synthesis and Characterization of Organogermane Compounds

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All experiments
were performed under a nitrogen atmosphere using
standard Schlenk techniques. Solvents were dried using a column solvent
purification system.75 (link) Me3SiCl
(95%), GeCl4 (>98%), KOtBu (>98%),
ClCOMes
(99%), ClCO(oTol) (98%), C6H4-1-4–(COCl)2 (>99%), C6H4-1-3–(COCl)2 (>99%), Br(CH2)4Br (99%), MeI (>99%) and [18]-crown-6 (99%), toluene (≥99%),
toluene-d8 (99 atom % D), THF-d8 (99.5 atom % D), CDCl3 (99.8 atom % D), butyl acrylate
(≥99%), styrene (≥99%), and methyl methacrylate (99%)
were used without any further purification. Tetrakis(trimethylsilyl)germane,76 (link) tetraacylgermane 1 and FCOMes were
prepared according to published procedures.54 (link)1H, 13C, and 29Si NMR spectra
were recorded on either a Varian INOVA 300 spectrometer in C6D6, THF-d8, or CDCl3 solutions and referenced versus TMS using the internal 2H-lock signal of the solvent. HRMS spectra were run on a Kratos Profile
mass spectrometer. Infrared spectra were obtained on a Bruker Alpha-P
Diamond ATR Spectrometer from the solid sample. Melting points were
determined using a Stuart SMP50 apparatus and are uncorrected. Elemental
analyses were carried out on a Hanau Vario Elementar EL apparatus.
UV absorption spectra were recorded on a PerkinElmer Lambda 5 spectrometer.
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4

Schlenk Techniques for Organometallic Synthesis

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All experiments
were performed under a nitrogen atmosphere using
standard Schlenk techniques. Solvents were dried using a column solvent
purification system.33 (link) ClSiMe3 (95%), KOtBu (>98%), ClCOMes (99%), ClCOAd (98%)
and 18-cr-6 (99%), were used without any further purification. 1H, 13C, and 29Si NMR spectra were recorded
on a Varian INOVA 300 spectrometer in C6D6,
THF-d8, or CDCl3 solutions
and were referenced versus TMS using the internal 2H-lock
signal of the solvent. HRMS spectra were obtained on a Kratos Profile
mass spectrometer. Infrared spectra were obtained on a Bruker Alpha-P
Diamond ATR spectrometer from the solid sample. Melting points were
determined using a Stuart SMP50 apparatus and are uncorrected. Elemental
analyses were carried out on a Hanau Vario Elementar EL apparatus.
UV absorption spectra were recorded on a PerkinElmer Lambda 5 spectrometer.
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