Single deprotonation of the bis(iminophosphorano)methane ligand (PhN═PPh₂)₂CH₂ (5-H₂) with 1 equiv of p-tBu-benzylpotassium followed by reaction with zinc(II) chloride led to the formation of the homoleptic complex ((PhN═PPh₂)₂CH)₂Zn, (5-H)₂Zn. Deprotonation of 5-H₂ with 2 equiv of p-tBu-benzylpotassium gave known potassium compound (5-K₂)₂ which reacted further with zinc(II) chloride to the dimeric carbene complex [(PhN═PPh₂)₂CZn]₂ ((5-Zn)₂). Crystal structures of (5-H)₂Zn and (5-Zn)₂ are compared to those of closely related Ca and Mg compounds. To analyze the charge distribution of these zinc complexes, density functional theory calculations on simple model systems were employed. Although the Zn–C bond in (5-Zn)₂ is highly ionic (81%) it is significantly more covalent than that in a similar dimeric Ca carbene complex (91% ionic).

中文翻译：

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_二聚氨基膦烷稳定的锌碳烯：（ZnCR ₂）_2的合成与结构

的双脱质子化单（iminophosphorano）甲烷配体（PhN═PPh ₂）₂ CH ₂（5 -H ₂）与1当量的p -吨卜benzylpotassium随后用导致的形成锌（II），氯化反应均配型络合物（（PhN═PPh ₂）₂ CH）₂的Zn，（5 -H）₂的Zn。用2当量的p - t Bu-苄基钾对5 -H ₂进行质子化，得到已知的钾化合物（5 -K ₂）₂其与锌（II）氯化物的二聚卡宾配合物[（PhN═PPh进一步反应₂）₂ CZN] ₂ - （（5 -Zn）₂）。将（5 -H）₂ Zn和（5 -Zn）_2的晶体结构与密切相关的Ca和Mg化合物的晶体结构进行比较。为了分析这些锌配合物的电荷分布，采用了在简单模型系统上的密度泛函理论计算。尽管（5 -Zn）_2中的Zn-C键具有高离子性（81％），但与类似的二聚Ca卡宾配合物（91％离子性）相比，其共价键明显更高。