do cationic ligands exist? If yes then how they form bond with transition metals in complex compounds. Give examples.
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ᴀᴄᴄᴏʀᴅɪɴɢ ᴛᴏ ᴛʜɪꜱ ᴍᴏᴅᴇʟ, ᴛʀᴀɴꜱɪᴛɪᴏɴ-ᴍᴇᴛᴀʟ ɪᴏɴꜱ ꜰᴏʀᴍ ᴄᴏᴏʀᴅɪɴᴀᴛɪᴏɴ ᴄᴏᴍᴘʟᴇxᴇꜱ ʙᴇᴄᴀᴜꜱᴇ ᴛʜᴇʏ ʜᴀᴠᴇ ᴇᴍᴘᴛʏ ᴠᴀʟᴇɴᴄᴇ-ꜱʜᴇʟʟ ᴏʀʙɪᴛᴀʟꜱ ᴛʜᴀᴛ ᴄᴀɴ ᴀᴄᴄᴇᴘᴛ ᴘᴀɪʀꜱ ᴏꜰ ᴇʟᴇᴄᴛʀᴏɴꜱ ꜰʀᴏᴍ ᴀ ʟᴇᴡɪꜱ ʙᴀꜱᴇ. ʟɪɢᴀɴᴅꜱ ᴍᴜꜱᴛ ᴛʜᴇʀᴇꜰᴏʀᴇ ʙᴇ ʟᴇᴡɪꜱ ʙᴀꜱᴇꜱ: ᴛʜᴇʏ ᴍᴜꜱᴛ ᴄᴏɴᴛᴀɪɴ ᴀᴛ ʟᴇᴀꜱᴛ ᴏɴᴇ ᴘᴀɪʀ ᴏꜰ ɴᴏɴʙᴏɴᴅɪɴɢ ᴇʟᴇᴄᴛʀᴏɴꜱ ᴛʜᴀᴛ ᴄᴀɴ ʙᴇ ᴅᴏɴᴀᴛᴇᴅ ᴛᴏ ᴀ ᴍᴇᴛᴀʟ ɪᴏɴ.
ᴀ ʟɪɢᴀɴᴅ ᴅᴇꜱᴄʀɪʙᴇᴅ ɪɴ ɪᴏɴɪᴄ ᴛᴇʀᴍꜱ ᴄᴀɴ ʙᴏɴᴅ ᴛᴏ ᴀ ᴍᴇᴛᴀʟ ᴛʜʀᴏᴜɢʜ ʜᴏᴡᴇᴠᴇʀ ᴍᴀɴʏ ʟᴏɴᴇ ᴘᴀɪʀꜱ ɪᴛ ʜᴀꜱ ᴀᴠᴀɪʟᴀʙʟᴇ. ꜰᴏʀ ᴇxᴀᴍᴘʟᴇ, ᴍᴀɴʏ ᴀʟᴋᴏxɪᴅᴇꜱ ᴜꜱᴇ ᴏɴᴇ ᴏꜰ ᴛʜᴇɪʀ ᴛʜʀᴇᴇ ʟᴏɴᴇ ᴘᴀɪʀꜱ ᴛᴏ ᴍᴀᴋᴇ ᴀ ꜱɪɴɢʟᴇ ʙᴏɴᴅ ᴛᴏ ᴀ ᴍᴇᴛᴀʟ ᴄᴇɴᴛᴇʀ.
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