On the other hand, poles apart from polyacenes, there had been many speculations about 1-D linear chain of sp-hybridized carbon atoms, which potentially exist in two forms: polyynes with alternate single and triple bonds and cumulenes with consecutive double bonds. Among the two series, cumulenes have seen the light of the day with an experimental observation of negative β values. Notwithstanding, the synthesis of polyynes has been extensively reported, culminating with the isolation of [22]polyyne, however, due to dramatic increase in reactivity, [9]cumulene is the longest derivative studied to date. This increased reactivity of [n]cumulenes itself points towards the open-shell character in longer cumulenes. However, the open-shell nature of cumulenes has not been reported hitherto. Here, in this work, we sought to re-examine the contradictory length dependence of molecular conductance for the acene series suspended between two gold electrodes. To further simulate the experimentally validated anti-ohmic behaviour in cumulene wires, phenyl substituted cumulene wires are chosen. The electrical conductance has been explicitly determined within the Landauer formalism using restricted closed-shell wavefunction for lower members in the series. While, broken symmetry (BS) wavefunction in an unrestricted formalism with spin and spatial symmetry breaking is used for higher members with OSS ground state.