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planar    音标拼音: [pl'enɚ]
a. 平面的,平坦的,二维的

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  • How can I tell whether or not a molecule is planar?
    Otherwise, its structure allows it to be planar Even though the molecule will have a structure that allows for it to exist in a planar conformation, there may be some many that do not persist in a planar conformation due to steric effects, or complex three dimensional geometries
  • inorganic chemistry - How to use crystal field theory to predict . . .
    How can one predict whether a given complex ion will be square planar or tetrahedral when its coordination number is 4 using crystal field theory? Is it possible to theoretically predict this?
  • Which diagram for crystal field splitting of Square Planar is accurate?
    I have come across these two splitting Which of these is correct when there is crystal field splitting of ligand in square planar manner Kindly provide reference of books and plausible explanatio
  • Difference between radial, planar, angular and spherical nodes
    What is the difference between them? I think radial nodes and spherical nodes are the same, and angular and planar nodes are the same Reference Finally, how many spherical nodes are there
  • Why is biphenyl not planar? - Chemistry Stack Exchange
    I've seen in a lot of books that biphenyl is not planar I don't know why that is, because both the carbon are $\\mathrm{sp^2}$ hybridized so it should be planar Can someone explain it to me?
  • Cyclopentadiene planar - Chemistry Stack Exchange
    Cyclopentadiene has a sp3 carbon yet it is said to be planar I am not able to understand and haven't been able to find a credible source Some sources say it to be non-planar
  • Why is the crystal field splitting energy larger for square planar than . . .
    1 It is because of the fact that square planar complexes are formed by much strong ligands with d8-metal cation of 3d- series transition metals cation and 4d or 5d-series transition metal cation with either weak or strong ligands The very strong ligands and 4d or 5d-series transition metal cations are responsible for higher crystal field
  • Cycloheptatrienyl anion is antiaromatic or non-aromatic?
    Cycloheptatrienyl is the more common example, and perhaps what you meant in your question considering you mention 8 π-electrons Consider (in the photo below) the carbanion; if this molecule was planar, it would be anti-aromatic (4n π-electrons, conjugated, and cyclic) and consequently incredibly unstable
  • Why is [PdCl4]2- square planar whereas [NiCl4]2- is tetrahedral?
    The molecule $\ce { [PdCl4]^2-}$ is diamagnetic, which indicates a square planar geometry as all eight d electrons are paired in the lower-energy orbitals However, $\ce { [NiCl4]^2-}$ is also $\mathrm {d^8}$ but has two unpaired electrons, indicating a tetrahedral geometry
  • Why does Fe(CO)₄ adopt a tetrahedral, as opposed to square planar . . .
    The hypothetical $\ce {Fe (CO)4}$ complex is isoelectronic to the observed $\ce { [Ni (CN)4]^ {2-}}$ complex and therefore would also be square planar [1,2] Both are 16 electron complexes, i e one of the valence orbitals of the central atom remains unoccupied Your assessment for $\ce {Fe^ {\pm0}}$ as $\mathrm {d^8}$ is absolutely correct, also that carbonyl is a good ligand causing a strong





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