  We report a detailed computational study by Brownian Dynamics simulations of
the structure and dynamics of a liquid of patchy particles which develops an
amorphous tetrahedral network upon decreasing temperature. The highly
directional particle interactions allows us to investigate the system
connectivity by discriminating the total set of particles into different
populations according to a penta-modal distribution of bonds per particle. With
this methodology we show how the particle bonding process is not randomly
independent but it manifests clear bond correlations at low temperatures. We
further explore the dynamics of the system in real space and establish a clear
relation between particle mobility and particle connectivity. In particular, we
provide evidence of anomalous diffusion at low temperatures and reveal how the
dynamics is affected by the short-time hopping motion of the weakly bounded
particles. Finally we widely investigate the dynamics and structure of the
system in Fourier space and identify two quantitatively similar length scales,
one dynamic and the other one static, which increase upon cooling the system
and reach distances of the order of few particle diameters. We summarize our
findings in a qualitative picture where the low temperature regime of the
viscoelastic liquid is understood in terms of an evolving network of long time
metastable cooperative domains of particles.
