Lecture #3-Molecular Polarity and Physical Properties
... Dipole–Dipole Attractions between Molecules Permanent polarity in molecules due to their structure Hydrogen Bonds between Molecules An especially strong dipole–dipole attraction resulting from the attachment of H to an extremely electronegative ...
... Dipole–Dipole Attractions between Molecules Permanent polarity in molecules due to their structure Hydrogen Bonds between Molecules An especially strong dipole–dipole attraction resulting from the attachment of H to an extremely electronegative ...
Rotational Motion Torque Moment of Inertia
... Important caveat: Moment of inertia depends on the object’s mass, shape, and the axis of rotation. A single object will have different moments of inertia for different axes of rotation. Also notice that these integrals and sums are similar to the expression for the center-of-mass, but for I we have ...
... Important caveat: Moment of inertia depends on the object’s mass, shape, and the axis of rotation. A single object will have different moments of inertia for different axes of rotation. Also notice that these integrals and sums are similar to the expression for the center-of-mass, but for I we have ...
Dissociation energy of the C-H bond in chloroform Cl3C
... side. Replace it with the long-path cell holder. Tighten the thumbscrews. Put empty 5-mm cells in the sample and reference compartments. Use the little sliding partitions to form 5-mm cell holders. Record the background spectrum from 1650-1750 nm. Place chloroform in the sample 5-mm cell and record ...
... side. Replace it with the long-path cell holder. Tighten the thumbscrews. Put empty 5-mm cells in the sample and reference compartments. Use the little sliding partitions to form 5-mm cell holders. Record the background spectrum from 1650-1750 nm. Place chloroform in the sample 5-mm cell and record ...
Chapter 9 Rotational dynamics
... (a) Find the rotational inertia about each of the three axes perpendicular to the x-y plane and passing through one of the particles. (b) A force of magnitude 4.5N is applied to m2 in the xy plane and makes an angles of 300 with the horizontal. Find the angular acceleration about oz axis. (c) Find t ...
... (a) Find the rotational inertia about each of the three axes perpendicular to the x-y plane and passing through one of the particles. (b) A force of magnitude 4.5N is applied to m2 in the xy plane and makes an angles of 300 with the horizontal. Find the angular acceleration about oz axis. (c) Find t ...
Towards a quantum gas of polar RbCs RbCs molecules
... state heteronuclear molecules as has recently been demonstrated using magneto-association followed by stimulated Raman adiabatic passage (STIRAP)[1-3]. These molecules have a large permanent electric dipole moment and may provide an alternative approach to quantum information processing[4]. We prese ...
... state heteronuclear molecules as has recently been demonstrated using magneto-association followed by stimulated Raman adiabatic passage (STIRAP)[1-3]. These molecules have a large permanent electric dipole moment and may provide an alternative approach to quantum information processing[4]. We prese ...
Chapter 10 Rotational Motion
... • The equations for rotational motion with constant angular acceleration have the same form as those for linear motion with constant acceleration. • Torque is the product of force and lever arm. • The rotational inertia depends not only on the mass of an object but also on the way its mass is distri ...
... • The equations for rotational motion with constant angular acceleration have the same form as those for linear motion with constant acceleration. • Torque is the product of force and lever arm. • The rotational inertia depends not only on the mass of an object but also on the way its mass is distri ...
Rotational spectroscopy
Rotational spectroscopy is concerned with the measurement of the energies of transitions between quantized rotational states of molecules in the gas phase. The spectra of polar molecules can be measured in absorption or emission by microwave spectroscopy or by far infrared spectroscopy. The rotational spectra of non-polar molecules cannot be observed by those methods, but can be observed and measured by Raman spectroscopy. Rotational spectroscopy is sometimes referred to as pure rotational spectroscopy to distinguish it from rotational-vibrational spectroscopy where changes in rotational energy occur together with changes in vibrational energy, and also from ro-vibronic spectroscopy (or just vibronic spectroscopy) where rotational, vibrational and electronic energy changes occur simultaneously.For rotational spectroscopy, molecules are classified according to symmetry into spherical top, linear and symmetric top; analytical expressions can be derived for the rotational energy terms of these molecules. Analytical expressions can be derived for the fourth category, asymmetric top, for rotational levels up to J=3, but higher energy levels need to be determined using numerical methods. The rotational energies are derived theoretically by considering the molecules to be rigid rotors and then applying extra terms to account for centrifugal distortion, fine structure, hyperfine structure and Coriolis coupling. Fitting the spectra to the theoretical expressions gives numerical values of the angular moments of inertia from which very precise values of molecular bond lengths and angles can be derived in favorable cases. In the presence of an electrostatic field there is Stark splitting which allows molecular electric dipole moments to be determined.An important application of rotational spectroscopy is in exploration of the chemical composition of the interstellar medium using radio telescopes.