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The di-mixed-valence complex [{(η⁵-C₅H₅)Fe(η⁵-C₅H₄)}₄(η⁴-C₄)Co(η⁵-C₅H₅)]²⁺, 1²⁺, has been evaluated as a molecular four-dot cell for the quantum cellular automata paradigm for electronic devices. The cations 1¹⁺ and 1²⁺ are prepared in good yield by selective chemical oxidation of 1⁰ and are isolated as pure crystalline materials. The solid-state structures of 1⁰ and 1¹⁺ and the midrange- and near-IR spectra of 1⁰, 1¹⁺, 1²⁺, and 1³⁺ have been determined. Further, the variable-temperature EPR spectra of 1¹⁺ and 1²⁺, magnetic susceptibility of 1¹⁺ and 1²⁺, Mössbauer spectra of 1⁰, 1¹⁺, and 1²⁺, NMR spectra of 1⁰, and paramagnetic NMR spectra of 1¹⁺ and 1²⁺ have been measured. The X-ray structure determination reveals four ferrocene “dots” arranged in a square by C−C bonds to the corners of a cyclobutadiene linker. The four ferrocene units project from alternating sides of the cyclobutadiene …