Dynamic simulations of the two-dimensional liquid and the two-dimensional solid are erroneous.

Very briefly (between ~0.8 and ~1.0 picosec), the heat capacity of the sample of iron is displayed with an erronously large value.

The temperature slider shown in the text section only works with the first one of the three samples that are available.

The simulation of the 100 atom sample of helium goes "bad" (loss of thermal equilibrium) after ~150 ps simulation time.

Using the "Collisions" link within the text turns on the visualization of all collisions (molecule-molecule as well as molecule-wall) rather than only the visualization of molecule-molecule collisions. However, the subsequent "Collision Density (Molecule-Molecule)" measurement in fact only counts molecule-molecule collisions. Remedy: Use "Model Customize..." to adjust the setting for collision visualization.

If the default temperature unit is °C, the isotherms in the generated plot are incorrectly labeled with a temperature unit of "K" (the numerical values are for °C).

The temperature slider shown in the text section only works with the first one of the three samples that are available.

The temperature slider shown in the text section only works with the first one of the three samples that are available.

Question #6 should say: Only a few elements are electronegative enough to occur in compounds with major hydrogen bonding capability.

In the answer to Question #1, the mass fraction should be given as a unitless number (0.043). As a percentage, the concentration is in fact 4.3 mass%.

The answer to Question #2 should say: "...an arrangement should be found where the nitrogen and one of the fluorines meet each other head-on upon collision."

Question #6: New energy values must be entered by editing the value field, rather than by using the slider.

Questions #3 and #4 shouldn't refer to the "equilibrium constant", but to the ratio that is given by the number of iodine atoms squared divided by the number of iodine molecules. This ratio indeed varies with pressure as shown in the answer to Question 3. The equilibrium constant (as, for example, expressed via partial pressures) does not vary with pressure as long as the temperature is constant.

As an unintended consequence of the recent internationalization of ODYSSEY, the plot at the center of the worksheet cannot be generated.

The text-embedded controls for building isomers of alkynes (Questions 4–6) are non-functional.

The text-embedded controls for building isomers of alkynes (Questions 4–6) are non-functional.

As an unintended consequence of the recent internationalization of ODYSSEY, the plot at the center of the worksheet cannot be generated as instructed (only the datapoints for the anions will display).

Clicking on the electron density buttons in Question 9 will erroneously reset the display to the full electrostatic potential map of ethene. To show the simple electron density surfaces of either ethene or ethyne, a manual switch back to the proper model via the radio buttons in Question 7 is required (that is, after requesting the display of the electron density in Question 9).

Clicking on the electron density buttons in either Question 3 or Question 7 will erroneously reset the display to the first model of the experiment ("Hypothetical Benzene I"). A manual switch back to the proper model (via the radio buttons in Questions 2 and 6) is required after requesting the display of the electron density.

Collecting datapoints for the sample of methane (Question #4) will "ruin" the temperature-entropy plot if (and only if) the temperature gets lowered to less than 298 K.

In Question 5, the labels ("Low" / "High") for the electron density buttons need to be swapped.

The answer to Question 9 gives Avogadro's constant with an erroneous minus sign.

The density surfaces of the first model (O^2–) will not display if the page is reached by scrolling forward from the Worksheet of the previous (Ionic Radii) experiment. Remedy: Reload the page.

Clicking on any of the electron density buttons towards the top of the page (Very Low to Very High) will erroneously always reset the display to the model of ammonia. For the other three molecules (ethanol, sulfuric acid, and hexane) a "manual switch" back to the desired model is required after requesting (or changing) the display of the electron density.

Strict application of VSEPR theory to XeF₆ would lead one to predict a pentagonal pyramid (= pentagonal bipyramid minus one axial vertex). As correctly pointed out in the text, such a structure is not observed.

Clicking on the "colisión molécula-molécula" link at the top of the page turns on the visualization of all collisions (molecule-molecule as well as molecule-wall) rather than only the visualization of molecule-molecule collisions. Remedy: Use "Model Customize..." to adjust the setting for collision visualization.

The nitrogen molecules in the UF₆/H₂/N₂ mixture are erroneously single-bonded.

At the bottom of the page, it should say: From the View menu, select Properties, and from the Properties menu (lower left corner), select Thermodynamics Volume.

In the last bulleted statement at the bottom of the page it should say: "La distribución de las velocidades llega a ser menos puntiagudos (más planos) conforme la masa se decrementa" (en vez de "incrementa").

Translation button is inactive (page only available in Japanese)

Contrary to what is described in the text, the sample of heptane gradually fills out the entire available volume, indicating a lack of cohesion during a room temperature simulation. The other two samples (DMSO and water) have sufficient cohesion for the molecules to stay together, but in each case the entire liquid blob slowly bounces around the simulation box.

Contrary to what is described in the text, the sample of heptane gradually fills out the entire available volume, indicating a lack of cohesion during a room temperature simulation. The other two samples (DMSO and water) have sufficient cohesion for the molecules to stay together, but in each case the entire liquid blob slowly bounces around the simulation box.

The displayed total path length is an average over all nitrogen molecules in the sample.

The displayed total path length is an average over all nitrogen molecules in the sample.

The displayed total path length is an average over all nitrogen molecules in the sample.

The "Objectives" should refer to the hexagonal close-packed lattice (instead of the body-centered cubic lattice) and to comparing the stacking order of the two types of close-packed lattices (instead of cubic lattices).

The "Objectives" should refer to the hexagonal close-packed lattice (instead of the body-centered cubic lattice) and to comparing the stacking order of the two types of close-packed lattices (instead of cubic lattices).

Both of the two-dimensional solids are unstable when subjected to dynamic simulations.

The extra lattice points are shown not in red, but blue.

The equation at the bottom of the page gives the misleading impression that the rate constants for the forward and reverse reactions are the same. As correctly spelled out in the text, it is the rates (not the rate constants) that are the same.

The equation at the bottom of the page gives the misleading impression that the rate constants for the forward and reverse reactions are the same. As correctly spelled out in the text, it is the rates (not the rate constants) that are the same.

In the first sentence, it should say that iodine melts at T = 114 °C and evaporates at T = 184 °C (just like the data in the subsequent table which is correct).

The last radiobutton on the page links to an incorrect model. The correct model (a complex of iron) is available in the dropdown menu in the upper left corner ( = sixth model from the top).

The model of cellulose includes an erroneous peroxo group.

In the third bulleted item, it should say that the phosphates give the molecule a negative charge of -2 for every single pair of nucleotides.

The page loads with error messages (which can be ignored). After loading the page title is missing.

Some of the nitro groups in the model of solid TNT are erroneously shown with multiple double bonds.

A wrong model is linked at the bottom of the page. The model of coenzyme A can still be reached, namely via the pull-down menu in the upper left corner.

2,3,3,3-Tetrafluoropropene (and not 1,1,1,2-tetrafluoropropane) should be shown as the refrigerant that is popularly labeled "HFO-1234yf".

The liquid sample of oleic acid includes one molecule in the trans-configuration ( = elaidic acid)

The second synonym for 2-Methyl-2-Propanol should be tert-Butyl Alcohol (and not Isobutyl Alcohol).

The model of cellulose includes an erroneous peroxo group.

The model of cellulose includes an erroneous peroxo group.

The model of cellulose includes an erroneous peroxo group.

The group labels for anions and cations (for "group-level" properties in the Properties table, such as Composition Number of Molecules) are swapped for cesium oxide, Cs₂O.

The charge of two last complexes is given incorrectly in the drop-down menu in the upper left corner (but next to the radiobuttons on the right, it is given correctly).

Saving IF₇ in the .odydata file format will make the program crash.

In the "Individual Items" display mode, the corresponding entries are mistakingly labeled as "Copper+Tin" and "Tin+Copper".

The ion at the center of the last complex is not cesium as claimed (it is antimony).

Some of the carbon monoxide molecules are single-bonded rather than triple-bonded.

The models and labels for the 3rd, 4th, and 5th substance on the page are scrambled. (The models for the other substances—difluoromethane, tetrafluoromethane, tetrachloromethane, bromomethane, iodomethane, dichloroethane, and bromobutane—are all correct.)

Invalid link in the "Individual Items" listing. Remedy: Open "Hydrosulfuric Acid" instead.

Saving IF₇ in the .odydata file format will make the program crash.

Saving IF₇ in the .odydata file format will make the program crash.

For ClF₃ and BrF₃, the lone pairs associated with the central atom are not displayed correctly. (For IF₃, the display is correct.)

The formula of lead sulfate is PbSO₄ (and not PbS).

The group labels for anions and cations (for "group-level" properties in the Properties table, such as Composition Number of Molecules) are swapped for lithium oxide, Li₂O.

Mercuric oxide, HgCl₂, is labeled incorrectly as "Mercury(I) Chloride". (However, the shown structures of both molecule and solid are correct.)

The bond order of the ozone molecules in the gas phase sample is "1" (rather than "1.5").

The group labels for anions and cations (for "group-level" properties in the Properties table, such as Composition Number of Molecules) are swapped for potassium oxide, K₂O, and potassium sulfide, K₂S.

The group labels for anions and cations (for "group-level" properties in the Properties table, such as Composition Number of Molecules) are swapped for sodium sulfide, Na₂S.

The "Ctrl+N" shortcut key (for "File New") doesn't work.

Adding a new component to certain stockroom models can sometimes make the program crash (an example is the addition of a noble gas to stockroom models of gaseous nitrogen or gaseous hydrogen). Remedy: Build the entire model from scratch rather than on the basis of an existing stockroom model.

Inserting "–H" and then clicking on the hydrogen will make the program crash.

Inserting "–H" and then clicking on the hydrogen will make the program crash.

Inserting "–H" and then clicking on the hydrogen will make the program crash.

The diacritical marks for the structure type names have been deliberately omitted.

Attempting to modify an existing model (for example, a model that was retrieved from the Molecular Stockroom) via double-clicking in the Solid build panel will lead to a program crash.

User-built models of gaseous helium do not allow for stable simulations because the automatically assigned time step is too large.

By default, the built model contains 48 iodine molecules (and not 96).

By default, the built model contains 288 carbon atoms (and not 128).

Because of a missing template in the build panel, the model cannot be built as instructed.

The Collisions visualization does not work for chain-like molecules (propane and up, similar inorganic molecules are also affected) because multiple halos are permanently drawn for each molecule.

The noble gas column of the "s/p/d/f Block" color scheme is blackened out.

The noble gas column of the "s/p/d/f Block" color scheme is blackened out.

All versions of SPARTAN will open ODYSSEY-generated models without problems if they were saved in the .odydata file format. However, in the Windows version of SPARTAN Student Edition (the other versions are not affected) an "Unsupported" message may be displayed if a calculation is set up with the Calculations dialog. Remedy: Open the .odydata file. The first line contains "keywords"—add the following keyword at the end of the line: MMFF.

All versions of SPARTAN will open ODYSSEY-generated models without problems if they were saved in the .odydata file format. However, in the Windows version of SPARTAN Student Edition (the other versions are not affected) an "Unsupported" message may be displayed if a calculation is set up with the Calculations dialog. Remedy: Open the .odydata file. The first line contains "keywords"—add the following keyword at the end of the line: MMFF.

All versions of SPARTAN will open ODYSSEY-generated models without problems if they were saved in the .odydata file format. However, in the Windows version of SPARTAN Student Edition (the other versions are not affected) an "Unsupported" message may be displayed if a calculation is set up with the Calculations dialog. Remedy: Open the .odydata file. The first line contains "keywords"—add the following keyword at the end of the line: MMFF.

When a snap plot is generated and the independent variable is changed by editing the corresponding number field (as opposed to using the adjacent slider), the Record button may become inoperative: no new datapoint is generated after clicking on the button even though it is "lighted up". Remedy: Click on the model background once, then reselect the Record button.

When a snap plot is generated and the independent variable is changed by editing the corresponding number field (as opposed to using the adjacent slider), the Record button may become inoperative: no new datapoint is generated after clicking on the button even though it is "lighted up". Remedy: Click on the model background once, then reselect the Record button.

Incorrect values will be recorded if many properties (more than ~10) have been added to the list.

Incorrect values will be recorded if many properties (more than ~10) have been added to the list.

Incorrect values will be recorded if many properties (more than ~10) have been added to the list.

Snapshots of models will not print correctly if the Properties table is shown and a property is "active", i.e., selected (indicated by a blue background behind the property name). No problems occur if all properties are inactive ( = none is selected).

The network-based licensing scheme doesn't work properly.

For 117 of the 694 worksheet questions, the answers are missing.

When resizing the program window while running under the Leopard operating system (Tiger is not affected), parts of the shown molecular model may temporarily disappear. Remedy: Slightly rotating the model will make the missing parts reappear.

When resizing the program window while running under the Leopard operating system (Tiger is not affected), parts of the shown molecular model may temporarily disappear. Remedy: Slightly rotating the model will make the missing parts reappear.

The time step (Properties Dynamics Time Step) of pre-built or user-built bulk samples of monatomics can be increased, but not reduced with the corresponding slider control in the Properties table.

When installing on a Windows Vista computer with an access code, the program will only run using the install account.

When installing on a Windows Vista computer with an access code, the program will only run using the install account.

When installing on a Windows Vista computer with an access code, the program will only run using the install account.

The shown keystroke combinations for One-Button mice are incorrect (OPTION should be replaced by the Apple key).

The inversion of sterocenters (via the right-click menu or by double-clicking while holding down the Apple key) doesn't work.

The first choice for the unit of length should be labeled "S.I." (for Système International), not "Si".

Adjusting the font size in the Preferences dialog doesn't work.

The setting of clipping centers is not functional for samples under vacuum conditions (but clipping still works correctly for samples with periodic boundary conditions).

Spurious ("spanning") hydrogen bonds are drawn if spherical clipping is turned on and the radius of the clipping sphere is relatively large.

Because of an Intel graphics driver error, picking a surface atom in a solid may sometimes erroneously select an atom in the interior, namely if the two atoms have a coordinate that is identical. The usual "halos" indicate which atom(s) have actually been selected (for example, during distance measurements).

Because of an Intel graphics driver error, picking a surface atom in a solid may sometimes erroneously select an atom in the interior, namely if the two atoms have a coordinate that is identical. The usual "halos" indicate which atom(s) have actually been selected (for example, during distance measurements).