We report on electroconvection patterns in the liquid crystal 4-ethyl-2-fluoro-4’-[2-(trans-4-pentylcyclohexcyl)-ethyl]biphenyl (I52) for two values of the parameter tau(d)/tau(sigma), where tau(d) is the director relaxation time and tau(sigma). is the charge relaxation time, as a function of the rms voltage and frequency of an applied AC electric field. For tau(d)/tau(sigma) = 180, we observe a forward Hopf bifurcation to a superposition of the two degenerate oblique roll states. The envelopes of these patterns are chaotic in space and time. There exists a secondary transition to a state which oscillates between the two degenerate modes. For tau(d)/tau(sigma) = 620, the initial instability is to a state of stationary oblique rolls. The secondary transition is to a superposition of the already existing oblique rolls and rolls of the same wavenumber which are perpendicular to the existing rolls. This forms stationary oblique squares.