Quark exchange effects in single flavored dibaryons

We reveal the quark exchange effects related to both the kinetic energy and various interactions in the single flavored dibaryon bound states with $^1S_0$ in the quark models. The hadron covalent bond can be established by the shared identical quarks due to the quark exchange effect between two colorless baryons. Such hadron covalent bond plays a decisive role in the deuteronlike di-$\Omega_{ccc}$ and di-$\Omega_{bbb}$ covalent molecule states. The $\sigma$-meson exchange is indispensable in the deuteronlike di-$\Delta^{++}$ and compact di-$\Omega$ states. The hadron covalent bond clearly appears in the di-$\Delta^{++}$ state but is hidden in the di-$\Omega$ state. The chromomagnetic interaction is always repulsive in the di-$\Delta^{++}$, di-$\Omega$, di-$\Omega_{ccc}$, and di-$\Omega_{bbb}$ states. The color-electric interaction is strongly attractive in the di-$\Omega$ state but weakly attractive or repulsive in the di-$\Delta^{++}$, di-$\Omega_{ccc}$, and di-$\Omega_{bbb}$ states.