Nuclear magnetic resonanceSpectroscopic technique based on change of nuclear spin stateBruker 700 MHz nuclear magnetic resonance (NMR) spectrometer.Nuclear Magnetic Resonance (NMR) basic principlesNuclear magnetic resonance (NMR) is a physical phenomenon in which nuclei in a strong constant magnetic field are disturbed by a weak oscillating magnetic field (in the near field) and respond by producing an electromagnetic signal with a frequency characteristic of the magnetic field at the nucleus.
TetramethylsilaneNames Preferred IUPAC nameTetramethylsilaneIdentifiers CAS Number75-76-33D model (JSmol)Interactive imageAbbreviations TMS Beilstein Reference1696908 ChEBICHEBI:85361ChEMBLChEMBL68073ChemSpider6156ECHA InfoCard100.000.818EC Number200-899-1MeSHTetramethylsilanePubChemCID6396RTECS numberVV5705400UNII41Y0RBG14QUN number2749 CompTox Dashboard(EPA)DTXSID9026423InChIInChI=1S/C4H12Si/c1-5(2,3)4/h1-4H3Key: CZDYPVPMEAXLPK-UHFFFAOYSA-NSMILESC[Si](C)(C)CProperties Chemical formulaC4H12SiMolar mass88.225 g·mol Appearance Colourless liquid Density0.648 g cm Melting point−99 to −102 °C (−146 to −152 °F; 174 to 171 K) Boiling point26 to 28 °C (79 to 82 °F; 299 to 301 K) Solubilityorganic solvents Structure Molecular shapeTetrahedral at carbon and silicon Dipole moment0 D Hazards GHS labelling: PictogramsSignal wordDangerHazard statementsH224, H302, H411Precautionary statementsP210, P233, P240, P241, P242, P243, P264, P270, P273, P280, P301+P312, P303+P361+P353, P330, P370+P378, P391, P403+P235, P501NFPA 704 (fire diamond) 341Flash point−28 to −27 °C (–18 to –16 °F), vapor may be pyrophoric Related compounds Related silanesSilaneSilicon tetrabromideSilicon tetrachlorideSilicon tetrafluorideSilicon tetraiodideHexamethyldisilaneRelated compoundsNeopentaneTetramethylgermaneTetramethyltinTetramethylleadExcept where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).Nverify ( ?)
Photoemission spectroscopyPhotoemission spectroscopy (PES), also known as photoelectron spectroscopy, refers to energy or spin measurement of electrons emitted from solids, gases or liquids by the photoelectric effect, in order to determine the binding energies or magnetic properties of electrons in the substance. The term refers to various techniques, depending on whether the ionization energy is provided by X-ray, EUV or UV photons.
Magnetic fieldIn magnetism and electromagnetism, magnetic field is a physical property of space that quantifies the magnetic influence at a given location.Magnetic momentIn electromagnetism, the magnetic moment or magnetic dipole moment is a vector quantity which characterizes the strength and orientation of a magnet or other object or system that exerts a magnetic field. The magnetic dipole moment of an object determines the magnitude of torque the object experiences in a given magnetic field. When the same magnetic field is applied, objects with larger magnetic moments experience larger torques.
HertzThe hertz (symbol: Hz) is the unit of frequency in the International System of Units (SI), often described as being equivalent to one event (or cycle) per second. The hertz is an SI derived unit whose formal expression in terms of SI base units is 1/s or s−1, meaning that one hertz is one per second or the reciprocal of one second. It is used only in the case of periodic events.
ResonancePhysical characteristic of oscillating systems
Molecular geometryMolecular geometry is the three-dimensional arrangement of the atoms that constitute a molecule. It includes the general shape of the molecule as well as bond lengths, bond angles, torsional angles and any other geometrical parameters that determine the position of each atom. Molecular geometry influences several properties of a substance including its reactivity, polarity, phase of matter, color, magnetism and biological activity.
Molecular orbitalIn chemistry, a molecular orbital is a mathematical function describing the location and wave-like behavior of an electron in a molecule. This function can be used to calculate chemical and physical properties such as the probability of finding an electron in any specific region. The terms atomic orbital and molecular orbital were introduced by Robert S. Mulliken in 1932 to mean one-electron orbital wave functions.
Atomic nucleusThe atomic nucleus is the small, dense region consisting of protons and neutrons at the center of an atom, discovered in 1911 by Ernest Rutherford at the University of Manchester based on the 1909 Geiger–Marsden gold foil experiment. After the discovery of the neutron in 1932, models for a nucleus composed of protons and neutrons were quickly developed by Dmitri Ivanenko and Werner Heisenberg.
Energy levelA quantum mechanical system or particle that is bound—that is, confined spatially—can only take on certain discrete values of energy, called energy levels. This contrasts with classical particles, which can have any amount of energy.
MoleculeA molecule is a group of two or more atoms that are held together by attractive forces known as chemical bonds; depending on context, the term may or may not include ions that satisfy this criterion. In quantum physics, organic chemistry, and biochemistry, the distinction from ions is dropped and molecule is often used when referring to polyatomic ions.Bond lengthIn molecular geometry, bond length or bond distance is defined as the average distance between nuclei of two bonded atoms in a molecule. It is a transferable property of a bond between atoms of fixed types, relatively independent of the rest of the molecule.*As an Amazon Associate I earn from qualifying purchases.