Find
Search
Titles, summaries, fields, series and the named objects of every essay, searched as you type.
Shape
- The mass nobody chose
- The exponent that runs both ways
- A barrier is not what a splitting measures
- It was never the mass
- Two sweeps and one lever
- The lever that was supposed to be smaller
- The shapes above six coordination
- A ceiling that rises where the measurements fall
- A dipole is not what an infrared spectrum sees
- A dispute is a small difference
- A gap that was a choice of bonds
- An estimate that can be wrong by two
- A verdict inside its own error bar
- Bent's rule, against the substituent series
- Five sites are not alike
- Four tables and one molecule to disagree about
- Hybrids that were never orthogonal
- One coordinate, three point groups
- One number decides which way it breaks
- The angle a ring cannot have
- The angle does not fix the hybridisation
- The atoms that meet across a ring
- The count that was never written down
- The curve between two rows
- The double bond a ring cannot hold
- The explanation with the wrong sign
- The lone pair is not the missing term
- The mode that moves least radiates most
- The ring that cannot hold still
- The sites are not the same size
- The strain that is not in the angles
- The table that could not have mattered
- Three bent bonds, and the same hybrid
- Two distortions in one coordinate
- Two numbers caught what one could not
- VSEPR, computed
- What a dipole cannot tell apart
- What a lone pair is worth
- Which angles are symmetry and which are the model
- Why water is bent
- Zero dipole is not no interaction
- The atoms are not at the points
- Deuterium cannot tell the masses apart
- An ordering worth half a per cent
- The two that are not on the line
- The ordering a manifold picks
- The long bond goes to the crowded site
Applied
- A blindness that is inherited
- A contraction that cannot reach three of them
- A denominator that fails both ways
- A distortion needs two states
- A moment between two integers
- A moment counts electrons, not orbitals
- An integer nobody measured
- An orbital carries no angular momentum
- Back-bonding is two interactions
- Copper is never quite octahedral
- Eighteen is a count
- How many parameters a curve is worth
- Overlap is not interaction
- Sixteen is also a count
- The bonds are what is left over
- The count that cannot be broken by strength
- The count that is not always eighteen
- The distortion that opens the gap
- The distortion the ends decide
- The direction the gap cannot see
- The double hump and what removes it
- The electrons repel less inside the complex
- The gap that only a tetrahedron closes
- The gap that would have to be smaller
- The g-value is the orbital coming back
- The integral that cannot count electrons
- The ligand the rule was waiting for
- The model is what is fitted
- The moment a fit invents
- The overlap the model is not proportional to
- The pairing energy decides the moment
- The product a curve measures
- The same count, two oxidation states
- The splitting against something structural
- The splitting is a symmetry statement
- The trans influence is an overlap argument
- Two models, one ratio
- What couples two spins
- Where a d–d band falls
- The orbital a ligand cannot reach
- The frustrated cluster with an even count
- It was the count, not the frustration
- The sign a frustrated ring changes
- The sign rule holds between two poles
- The correction that moves three of them backwards
- The channel that points at the metal
- Purity renames the poles
- Five more clusters break the band
Beyond
- The cage is on both sides
- The gap found on purpose
- The leftover changes sides
- A cage needs one pair more than it has corners
- A count that changes at one point
- A mean field cannot get out of the way
- A second criterion left a gap too
- A sign change is not always a zero
- A stabilisation is measured from somewhere
- A third kind of correlation
- Conjugation, and its limits
- Counting was right except where it mattered
- Delocalisation
- Expensive is not the same as unadopted
- Fifty descriptions of one molecule
- Four centres, and the pair that will not localise
- Four is all that s and p can match
- Half of it is given back at one bond
- How many descriptions a cage has
- Hypervalency does not stop at three centres
- Hypervalency is about the ligands
- Hypervalency without d orbitals
- One scale, from two centres to a cage
- Six electrons in a ring that is not all carbon
- The answer a search is most likely to give
- The band limit
- The count is the population
- The count the table was hiding
- The give-back that turned into a saving
- The group nobody wrote a table for
- The hexagon is the frame's doing
- The hole that is not repulsion
- The reference decides the correlation
- The ring with a twist in it
- The vibration that lowers the symmetry
- Three-centre bonding, computed
- Three shapes from one search
- Two kinds of correlation, and only one is small
- Two models that disagree about the shape
- What one pair can hold together
- Where the count stops being an effort
- Where the electrons are, without subtracting anything
- Where two-centre bonding stops
- The square that wastes an orbital
- Six disagreements and three calculations
- The basis a diagonaliser happened to return
- An angular ring rescales what lies beyond it
- Folding the ring does not give the orbital back
Solids
- A band becomes a bell curve
- A band with no structure in it
- A chain cannot stay even
- A count rather than an average
- A decay that keeps slowing down
- A defect is a level in the gap
- A density of states is not a spectrum
- A band that is a hundred and seventy decades of nothing
- A mixture is not the average of its ends
- A particle in a box the alloy made
- A solid is a molecule that did not stop
- A vacancy is not an impurity
- Counting electrons in an extended structure
- Five rings that were five different sizes
- Half filled is as bonded as it gets
- One defect is a level, many are a band
- Seven points that looked like a switch
- The arrangement a count cannot pick
- The bond that weakens as neighbours multiply
- The chain distorts hardest where it stops
- The composition that is hard is not the full one
- The constant that belonged to one net
- The distortion the filling chooses
- The exponent was the floor
- The end is the hardest place to bind
- The gap is not the band width
- The insulator band theory cannot see
- The lattice sum that depends on the order of adding
- The length at which levels become a band
- The other window was a plateau too
- The rule of thumb was on the flat part
- The triangles that were never in the bands
- The width of a band is a count of neighbours
- The window that was not a plateau
- Three points, and they all go down
- Two bands, if the chain is short enough
- Twelve basins where there were two
- Two bands, and the shape of each
- Two defects, and the level between them
- Two structures with the same neighbours
- Two ways of being second order
- What a metal actually is
- What holds a solid together
- Where a molecule stops being one
- Where the states pile up
- A net with no two-colouring
- The gap follows the winner late
- The share that was read as a line
Wrong
- A band gap is not a bond energy
- A better energy is not a better answer
- A bond order between atoms that do not interact
- A capacity that is largest where there is none
- A correlation is not an account
- A double bond is not two single bonds
- A filled shell is not an empty statement
- A full band is not an insulator
- A half-filled band is not always a metal
- A mean that is low rather than right
- A ranking is not a difference
- A regime that belongs to the neighbours
- A satellite that never loses its place
- A surface is not a count of broken bonds
- Delocalisation is stabilising, and other things that are false in general
- Electronegativity is not one quantity
- Five failures in five different places
- Hybridisation does not explain
- Koopmans' theorem is exact for nothing
- Orbitals are not where the electron is
- The amplitude the collapse left behind
- The aufbau order is not a property of the atom
- The bond length that depends on the isotope
- The carriers a distortion was hiding
- The correction that was computed somewhere else
- The dipole is not a sum of bonds
- The exponent was the window's
- The force field is not in the spectrum
- The frequency is not the bond strength
- The half of the square a ring of four cannot show
- The metal a thermometer cannot find
- The same overlap, a different bond
- The second number is the error, rearranged
- The spectrochemical series is not electrostatics
- The third way to be an insulator
- The warning a cheap calculation gives
- The worst of the six was the one we asked about
- Two wrong numbers and a right difference
- VSEPR does not reach a transition metal
- What a photoelectron spectrum measures
- Where a closed form stops being one
- A symmetry holds or it does not
- No panel of this kind can find an exception
- Six of fifteen change verdict
- A size the fit was not made from
- Four quantities go and one question stays
- The rule is not the lever
- The limit of one is a parity
Spectra
- A band is a filter on the modes
- A bond length out of a spectrum
- A contrast with a closed form
- A hundred lines and no way to sort them
- An expression for what was a warning
- A ratio of exactly one is a tie
- A ratio that squares what it measures
- A spectrum that changes when only a mass does
- A spectrum counts environments, not atoms
- Fewer bands than electrons
- Group frequencies, and where they stop
- How many frequencies, not how many modes
- How much of a band is a bond stretch
- More bands than there are orbitals
- Mutual exclusion does not prove a centre
- Normal modes are not bond stretches
- One number was one direction
- One number was a direction too
- The axis that goes the other way
- The boundary belongs to the gap
- The constant a spectrum cannot see
- The coordinate an isotope reports
- The correction that was invented
- The distortion the ratio cannot see
- The forty-five that are fixed
- The isotope shift is arithmetic
- The moment that is the sum of the other two
- The number the tie got right
- The rotational spectrum is a moment of inertia
- The rotor that stretches
- The six motions that are not modes
- The sum was flat all along
- The suspect that did not fit
- The term a harmonic field cannot produce
- The top that reports all three
- The width of a band is a bond length
- Three numbers is not a structure
- Two moments about two different lines
- Two structures, two spectra
- What an absence proves
- When a mode becomes a bond stretch
- Why a d–d band is weak
- The cubic a Morse curve guesses
- The second molecule with a blind spot
- Adding data made it worse
- The residual was a loop
- Two coefficients are not a potential
- Two integers made one exponent
Orbitals
- A bond is not two atoms overlapping
- A contraction is a decision made once
- A control that outranked the mechanism
- A correction computed at one length
- A correction that is two functions
- A filled shell has no shape
- A function that is already there
- A Gaussian is the wrong shape
- A size a confound cannot supply
- A slice is not the surface
- How big is an orbital
- Nodes
- One basis size where it is worth doing
- One level is not one comparison
- Complex harmonics against real ones
- Say what it encloses
- The assembly that counts one share twice
- The atom does not bring its own orbital
- The basis the other atom lent
- The correction that gets harder to assemble
- The error was the row, not the charge
- The half that cannot be computed
- The isovalue nobody chose
- The line was holding the answer up
- The measurement a basis was not fitted to
- The property that gets worse
- The radial distribution across the periodic table
- The radius that was tabulated
- The residue that is two numbers
- The residue is below its own noise
- The surface a neighbour moves
- The surface a table draws
- The tenth that is not drawn
- What an electron actually feels
- What an orbital is
- What the screening model cannot see
- Where the electron is
- The orbital in momentum space
- The overshoot was one arrangement
- A repair that costs more than the whole
- The sum of the exponents, not the softer ion
- One contraction for two conditions
- Three contractions for one shell
- The nodes in the other variable
- Oblate in the picture nobody draws
- The zero belongs to one determinant
- The zero is a parity, not a bond
- Length did not rescue the consecutive triples
Bonding
- A bond with nothing in the middle
- A difference does not make a transfer
- A method that is not additive
- An anomaly that is not the first of a series
- A parameter that never finds a value
- An interior maximum a third orbital allows
- Aromaticity as a computed shell closure
- A weight that depends on how it is weighed
- Bond order from the eigenvectors
- Closer is not more overlap
- Exactly zero
- Hückel theory and what it gets right
- Hybrids are a basis
- Hückel with a heteroatom
- Molecular orbital and valence bond
- One spectrum, a line of models
- Overlap decides
- The angle that does not have to be searched for
- The antibonding level goes up more
- The criterion that has never said no
- The five figures were an identity
- The floor was in the bookkeeping
- The error bar that would be needed
- The frame that was allowed to relax
- The hybrids that point outside the bonds
- The localisation transformation, demonstrated
- The node that decided a picture
- The pair that is not a tie
- The quantity no scale prints
- The ranking moved and the headline did not
- The reach is the molecule's
- The same ring, three charges
- The smallest many-electron calculation
- The value that only exists in the bond
- Two bent bonds, or a σ and a π
- Two pictures, one plane
- Two systems a model cannot tell apart
- Where molecular orbital theory dissociates
- Which numbers carry a frame
- The other end of the bracket is not a number
- Water's lone pairs are not a pair
- A level no symmetry was protecting
- Three chains and ninety orderings ruled out
- A denominator needs three currencies
- A floor on models written in one scale
- A bend is not an end
- The spin the count does not hold
- The scatter counts angular rings
Symmetry
- A label that prices nothing
- An infinite group, worked in a finite one
- A reach that has no length
- Character tables and reduction
- Chirality is a symmetry statement
- Degeneracy is a group theorem
- Descent in symmetry
- Every group a molecule can fall to
- Four angles the shell chooses
- How far, and along which coordinate
- How much symmetry is left
- How nearly a broken symmetry survives
- More coordinates than motions
- Neither of the two separations
- None of the six was a crossing
- One integer, and everything it changes
- One table, three groups
- Point groups from coordinates
- Selection rules are one theorem
- Site symmetry, and what it constrains
- Six bonds and four orbitals
- Symmetry forbids a dipole
- Ten directions no frequency can see
- The coordinate it was already soft along
- The current does not divide
- The degeneracy no group predicts
- The group of a molecule that will not hold still
- The projector is unique, the basis is not
- The ring's levels are its group's characters
- The symmetry that is not a rotation
- The tolerance is a decision
- Three events, and a ratio of two dipoles
- Two events where there was one
- Two rules that share no arithmetic
- Why a character table stops where it stops
- The one intensity symmetry does fix
- A formula that predicts minus eleven vibrations
- Five coordinates for six vibrations
- Consistently wrong is not a limit
- The variation was the basis
- Two levels cannot make a minimum
- The crossing nothing couples
- The quarter, generalised
- No length separates them
- Four alkalis the model cannot hold
- The census a bond rule was hiding
- An end effect with two signs