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We present an overview of the measurements of $t\bar{t}$ spin correlations inthe CMS Collaboration. We present two analyses both in the dilepton channelusing proton-proton collisions at $\sqrt{s}\, =\, 7$ TeV based on an integratedluminosity of 5.0 fb$^{-1}$. The spin correlations and polarization aremeasured using angular asymmetries. The results are consistent with unpolarizedtop quarks and Standard Model spin correlation. The second analysis sets alimit on the real part of the top-quark chromo-magnetic dipole moment of$-0.043\, <\, Re({\hat{\mu}}_{t})\, <\, 0.117$ at $95\,%$ confidence levelthrough the measured azimuthal angle difference between the two charged leptonsfrom $t\bar{t}$ production.

Measurements of $t\bar{t}$ spin correlations in CMS